Document:

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                                                                   EXHIBIT 10.33

                          FACILITIES SERVICE AGREEMENT

         This FACILITIES SERVICE AGREEMENT (this "Agreement") is made and
entered into as of this 25th day of June, 2003, by and between COLLOCATION
SOLUTIONS, LLC, a Texas limited liability company ("CS"), having a principal
place of business at 1950 Stemmons Freeway, Suite 2033, Dallas, Texas, 75207,
and Zix Corporation, a Texas corporation ("CUSTOMER"), having a principal place
of business at 2711 N. Haskell Ave., Suite 2300, LB 36, Dallas, Texas 75204.

                                    RECITALS

    A.   CS and the landlords of various buildings (the "Buildings") have
         entered into certain leases (the "Leases") whereby CS leases certain
         premises (individually or collectively, the "Premises") within such
         Buildings. One of these Premises is located at 205 W. 9th Street, Suite
         201, Austin, TX 78701 and is considered the Premises for purposes of
         this specific Agreement.

    B.   Customer is the owner, lessee or licensee of certain computer and
         telecommunications equipment (the "Equipment") and desires to operate
         its Equipment at a Site (hereafter defined) within the Premises.

    C.   Customer desires that CS perform certain Services (hereunder defined),
         from time to time, in connection with Customer's operation of the
         Equipment at the Site.

    D.   CS and Customer agree that Customer may locate its Equipment at the
         Site designated and that CS shall perform the Services with respect to
         the Equipment at the Site, all on the terms and conditions set forth in
         this Agreement.

         Now, therefore, in consideration of the above recitals, the mutual
promises set forth herein, and other good and valuable consideration, the
receipt and sufficiency of which is hereby acknowledged, the parties hereto
hereby agree as follows:

1.       DEFINITIONS. For purposes of this Agreement, the following definitions
shall apply.

         (a)      "Commencement Date," as stated on Schedule A, shall mean the
date that CS delivers the Site to Customer with the Services set forth in this
Agreement. Customer may, but shall not be required to, accept the Site prior to
the Commencement Date, but in no event will CS be required to deliver the Site
to Customer prior to the Commencement Date.

         (b)      "Service Charges" shall mean the amount payable by Customer in
respect of and as consideration for CS's performance of the Services.

         (c)      "Services" shall mean those services attached hereto as
Schedule A.

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         (d)      "Site" shall mean the specific location, as stated on Schedule
A, designated by CS in the Premises for the cabinets and/or racks containing the
Equipment and from which the Equipment shall be operated, maintained and
managed.

         (e)      "Term" shall mean the period commencing on the Commencement
Date and ending on the date which is three (3) years hereafter.

2.       INSTALLATION OF EQUIPMENT.

         (a)      From and after the Commencement Date, CS grants to Customer a
license to install, at its sole cost and expense, access and operate the
Equipment at the Site in the Premises designated by CS. Customer shall complete
and provide to CS a written list of the initial Equipment to be installed at the
Site, which list shall be in the form attached hereto as Exhibit A to Schedule
A. Prior to the Commencement Date, CS shall install distribution points in or
near the Site (the "Distribution Points") to which the Equipment will be
connected to the Uninterruptible Power Supply ("UPS"), Emergency Power Supply
("EPS") and DC Power System ("DCPS"), as appropriate. The costs and expenses of
connecting the Equipment to the Distribution Points shall be borne by Customer.
The cost and expense of installing, operating and maintaining the Distribution
Points, the EPS, DCPS and the UPS, and the connection of the EPS, DCPS and the
UPS to the Distribution Points shall be borne by CS. The Equipment shall be
connected to the Distribution Points by CS or its contractors. Customer shall
pay CS for the costs and expenses to connect the Equipment, at the rates set
forth in Schedule A, within thirty (30) days following its receipt of CS's
invoice thereof.

         (b)      In addition to CS, only those individuals whom Customer has
previously identified in writing to CS will be entitled to enter the Site.

         (c)      Customer will provide CS with a minimum of twenty-four (24)
hours prior written notice of the installation or removal of any Equipment from
or at the Site. Notwithstanding the foregoing, in the event of an emergency, CS
shall use commercially reasonable efforts to coordinate Customer's use of the
Site in connection with the installation or removal of any Equipment upon less
than twenty-four (24) hours notice, and Customer shall cooperate with CS in that
regard. Customer shall not be entitled to install any Equipment at the Site if
at the time of such installation Customer is in default of this Agreement.
Customer shall be solely responsible for all costs of removing any Equipment
from the Site or transporting any Equipment to and installing any Equipment in
the Site.

         (d)      Customer acknowledges that its license to access the Premises
is nonexclusive and coextensive with CS's other customers' rights to access the
Premises, and that such other customers operate network and telecommunications
equipment similar to Customer's Equipment from other sites within the Premises.

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3.       PERFORMANCE OF SERVICES.

         (a)      From and after the Commencement Date, CS shall provide the
Services described in accordance with industry standards through its employees,
agents or independent contractors.

         (b)      Following the Commencement Date, the Equipment and the Site
shall be accessible to Customer and its previously designated employees
twenty-four (24) hours per day, seven (7) days per week, on an unescorted basis
throughout the Term hereof. Only those individuals whom Customer has previously
identified in writing to CS will be allowed to enter the Site. Any agents,
contractors, subcontractors, sublicensees, or collocators of Customer shall be
entitled to access the Equipment and the Site twenty-four (24) hours per day,
seven (7) days per week, so long as any of the same are at all times accompanied
by an employee of Customer. Notwithstanding anything in this Agreement to the
contrary, CS shall not deny Customer's access to the Site and to Customer's
Equipment at any time for any reason, subject to the rights of landlords under
the Leases; provided, however, that upon termination of this Agreement with
respect to any Site and the removal of Customer's Equipment therein in
accordance with the terms hereof, Customer shall have no further right of access
to that Site.

         (c)      CS shall perform routine maintenance of the UPS, DCPS and the
EPS and related support equipment on a regularly scheduled basis with no
interruption to operation of the Equipment. Major preventive maintenance (e.g.
load bank test, major PM's, battery replacement, etc.) or any maintenance that
may cause an interruption in Service will be performed on the UPS and the EPS
and related support equipment on a scheduled basis with the Customer receiving
thirty (30) days written notice prior to such maintenance. CS and Customer will
work together in good faith to schedule all maintenance so as to minimize the
effect of Service interruptions. Emergency maintenance will be performed as
required with as much advance notice to Customer as the emergency permits. All
maintenance will be performed so as to minimize the possibility of Service
interruptions. Customer shall promptly notify CS of any situations requiring
maintenance, and CS shall use reasonable diligence to correct such situations in
a timely fashion; provided, however, that in no event shall CS be deemed in
default of this Agreement for any failure of its obligations hereunder except as
set forth in Section 6(c)(3) hereof.

         (d)      All labor, parts and supplies required for the Services shall
be supplied by CS at CS's sole cost and expense. All labor, parts and supplies
required for the Equipment, other than labor, parts and supplies required for
the connection of the initial Equipment to the UPS, DCPS and the EPS, shall be
supplied by the Customer at the Customer's sole cost and expense.

         (e)      Connections, cross-connects and required interfaces from
fiber/telecommunication service providers to the "Meet Me Room" in connection
with the Customer's Equipment, and any telecommunications equipment necessary
therefor, shall be the responsibility of Customer and shall be separately
contracted for by Customer with such fiber/telecommunications service provider
at Customer's sole cost and expense. Upon request, CS will provide, through its
employees, agents or subcontractors, assistance with any of the above at
Customer's cost, to be reimbursed by Customer to CS within thirty (30) days
invoice thereof to Customer.

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         (f)      Connections of fiber from the Site to the "Meet Me Room" in
connection with Customer's Equipment shall be the responsibility and at the sole
cost and expense of Customer and shall be separately contracted for by Customer
with contractors reasonably approved by CS and, where required, by CS's landlord
with respect to the Site. Upon Customer's request, CS will assist Customer in
securing additional riser access rights within a Building in which a Site is
located, and Customer shall reimburse CS for any additional costs or rents CS
incurs under its Leases or otherwise with respect to any such additional riser
access rights. With respect to any one-time costs associated with the foregoing,
Customer shall reimburse CS therefor within thirty (30) days following CS's
invoice thereof to Customer; with respect to any costs and expenses associated
with the foregoing that are payable by CS monthly as additional charges or rent
under CS's Leases, Customer, upon one-time written notice thereof from CS, will
pay such monthly charges to CS with Customer's payment of the Service Charges.
Under no circumstances, however, will CS be responsible for providing any such
connectivity or equipment or the costs associated therewith.

         (g)      CS's "Meet Me Room" at the Premises will provide Customer
access to multiple fiber/telecommunications service providers. CS's carrier
neutral strategy will permit Customer to interconnect with any provider
providing services to the "Meet Me Room." Customer may request that CS allow
alternate fiber/telecommunications service providers to provide services to the
"Meet Me Room," and in connection with any such request, Customer shall provide
CS with any additional information regarding such alternate
fiber/telecommunications service provider CS may reasonably request. CS will
review any such request in light of the then-current space availability and
accessibility in the "Meet Me Room" and other reasonable factors and shall not,
based upon such review, unreasonably withhold consent to such alternate
fiber/telecommunications provider's access to the "Meet Me Room". Under no
circumstances shall CS be responsible for any costs or expenses associated with
Customer's connection to any fiber/telecommunication service providers.

         (h)      The fiber/telecommunications service providers providing
service to the "Meet Me Room" will be responsible for providing to the Customer
a service level agreement for such service. CS shall not enter into any service
level agreements with Customer nor shall CS be under any responsibility to
provide Customer with any specific fiber/telecommunications services. In no
event shall any failure under any service level agreement impair Customer's
obligation to pay Service Charges or result in abatements thereof, give Customer
the right to terminate this Agreement, or result in a breach of this Agreement
by CS.

         (i)      In the event that CS fails to provide the Services for any
reason for more than one (1) hour, the Customer shall be entitled to an
abatement of the Service Charges due for that day. In the event CS fails to
provide the Services for any reason for more than one (1) hour on more than four
(4) days in any one (1) calendar month, Customer shall have the right to
terminate this Agreement as stated below. Customer's failure to notify CS of its
claim to any abatement of Service Charge or termination of this Agreement within
ten (10) days following the end of the calendar month in which such abatement or
termination right arises shall be deemed Customer's waiver of such abatement or
termination rights.

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4.       SERVICE CHARGES.

         (a)      Customer shall pay CS the Service Charge and nonrecurring fees
as set forth in Schedule A. The Service Charges for the first full calendar
month following the Commencement Date and One-time nonrecurring charges, if
applicable, shall be due and payable with and upon execution of this Agreement.
Thereafter, Service Charges shall be due and payable on the first day of each
consecutive month after the Commencement Date without demand. If the
Commencement Date is not the first day of the month, on, or prior to, the
Commencement Date, Customer shall pay to CS a pro-rated Service Charge for the
remainder of the subject calendar month. The Service Charges are exclusive of
any applicable taxes and other charges arising as a result of this Agreement or
Customer's ownership or operation of the Equipment, all of which Customer shall
pay when due.

         (b)      With and upon execution of this Agreement, Customer shall pay
to CS a security deposit (the "Deposit"), as set forth in Schedule A, for the
full and faithful performance of Customer's obligations hereunder. The Deposit
shall not bear interest. CS shall return the Deposit to Customer within thirty
(30) days after the expiration or earlier termination of this Agreement;
provided, however, that CS shall have no obligation to return any portion of the
Deposit unless and until Customer has paid all amounts due to CS under this
Agreement. CS shall have the right to apply all or part of the Deposit to any
amount which has become due under a Service Order (hereinafter defined) and
which is not received by CS within ten (10) days after receipt of written notice
by Customer of non-payment. Upon application of any part of the Deposit,
Customer shall, within ten (10) days of receiving written notice from CS,
replenish the Deposit to the deposit amount existing immediately prior to such
application. Any application of all or a portion of the Deposit to any overdue
amount shall not constitute or be deemed a waiver of any other right or remedy
of CS under this Agreement.

         (c)      In addition to the Service Charges described in Section 4(a),
Customer shall pay all sales, franchise, use, income, excise, telecommunications
or other applicable taxes arising out of or relating to Customer's Equipment,
excluding any such taxes attributable to the performance of the Services and the
receipt of Service Charges.

         (d)      Customer shall pay CS a late payment charge of 1.5 percent per
month, or the maximum rate permitted by applicable law, whichever is less, on
any unpaid amount for each calendar month or fraction thereof that any payment
thereof to CS is in arrears from the due date to the date payment is received.
Customer shall reimburse CS for all bank fees incurred by CS due to returned
checks and/or dishonored payments.

5.       NEGOTIATION OF WARRANTY. EXCEPT AS OTHERWISE SPECIFICALLY PROVIDED
HEREIN, CS DOES NOT WARRANT THE SERVICES PERFORMED HEREUNDER OR THE ACCURACY OR
CORRECTNESS OF THE PERFORMANCE OR RESULTS OF THE SERVICES, AND THERE ARE NO
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, WARRANTIES OR
MERCHANTABILITY OF FITNESS FOR ANY PARTICULAR PURPOSE. CUSTOMER'S SOLE RECOURSE
IN THE EVENT OF A FAILURE OF THE

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SERVICES OR CS's FAILURE TO PROVIDE THE SERVICES IS TO TERMINATE THIS AGREEMENT
AS SPECIFICALLY SET FORTH HEREIN.

6.       TERM AND TERMINATION.

         (a)      This Agreement shall be effective as of the date hereof and,
unless otherwise terminated or canceled as provided herein, shall remain in full
force and effect for the Term. If CS fails to deliver the Site by the
Commencement Date and with the Services specified, CS shall give Customer one
(1) day of free Service for each day of delay until the Site is delivered as
specified.

         (b)      CS hereby grants to Customer an option to renew the Agreement
for one (1) additional term of three (3) years upon the expiration of the
initial Term hereof. Such option shall be deemed exercised unless Customer gives
written notice to CS or CS gives written notice to Customer to terminate the
Agreement at the end of the initial Term; such written notice to be received by
CS, or Customer, no less than three (3) months prior to the expiration date of
the Term. The initial Term and the renewal term may be referred to collectively
herein as the "Term". During the renewal term, there shall be no changes in the
Service Charges unless specified elsewhere in this Agreement.

         (c)      This Agreement may be terminated or canceled:

                  (1)      By CS, if Customer fails to pay CS the Service
                           Charges, taxes or other charges required by Customer
                           to be paid hereunder within ten (10) days following
                           written notice by CS to Customer of such failure.

                  (2)      By Customer, if Customer is denied access to that
                           Site for reasons within CS's reasonable control, and
                           such denial continues beyond two (2) days following
                           CS's receipt of written notice thereof. Failure by
                           Customer to terminate this Agreement within ten (10)
                           days following the end of the calendar month in which
                           such right arises shall be deemed Customer's waiver
                           of its right to terminate this Agreement for such
                           denial of access. CS shall use commercially
                           reasonable efforts to remedy any denial of access due
                           to reasons beyond its reasonable control.

                  (3)      By one party, if the other party is in material
                           default of any provision hereunder with respect to
                           that Site and such default is not cured within thirty
                           (30) business days after written notice thereof is
                           given to the other party or such additional time as
                           the nature of the cure may require, so long as such
                           cure is commenced within such thirty (30) day period
                           and is thereafter diligently prosecuted.

                  (4)      By one party, if a petition in bankruptcy is filed by
                           or against the other party under the United States
                           Bankruptcy Code, which petition is not

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                           dismissed, discharged or stayed within ninety (90)
                           days after the date of filing of the petition in the
                           Bankruptcy Court.

         (d)      In the event of any termination or cancellation of this
Agreement by CS for the reasons in 6 (c), CS may (but shall not be required to):

                  (1)      Declare all amounts of Service Charge owed to it
                           hereunder for the remainder of the Term to be
                           immediately due and payable, including the costs of
                           any improvements CS made on behalf of Customer,
                           together with interest thereon at a rate of ten (10%)
                           per annum. After Customer makes such payment to CS,
                           Customer shall have no further obligation to CS with
                           regards to such Site; and

                  (2)      After thirty (30) days prior written notice to
                           Customer of the termination of this Agreement, remove
                           the Equipment from the Site and dispose of same in
                           any manner determined by CS in its sole discretion
                           without any liability to Customer therefor, provided,
                           however, that Customer and those having a security
                           interest in the Equipment shall have access to the
                           Site at all times (even in the event of default) to
                           remove their Equipment; and

                  (3)      Cease performance of all Services hereunder with
                           respect to the Site without any liability to Customer
                           therefor, including, but not limited to, removing the
                           Equipment from UPS and EPS power.

         (e)      The foregoing rights and remedies of CS shall be cumulative
and in addition to all other rights and remedies available to CS in law and in
equity.

7.       LIMITATION OF LIABILITY; INDEMNIFICATION; INSURANCE.

         (a)      In no event shall either party be liable to the other or to
any third party for, and each party hereby releases the other party from, any
indirect, special or consequential damages or lost profits arising out of or
related to (i) this Agreement, (ii) the performance of the Services hereunder,
(iii) Customer's location, operation and maintenance of the Equipment at the
Site, (iv) any breach hereof by either party, or (v) any loss, suspension or
interruption of electrical, UPS, DCPS or EPS power, air conditioning or any
other Building or Premises mechanical or plumbing system serving the Building,
the Premises or the Site, even if such Party has been advised of the possibility
of such indirect, special or consequential damage. The Parties hereto
acknowledge that there are no actual or intended third-party beneficiaries
hereof.

         (b)      CS shall not be liable to Customer for, and Customer hereby
releases CS from, any injury, loss or damage to property or business resulting
from or relating to the performance of the services by CS hereunder. Customer's
sole remedy in the event of a default by CS under this Agreement shall be to
terminate this Agreement as set forth in Section 6 (c) hereof.

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         (c)      Customer will indemnify, protect, defend and hold harmless CS
from and against all claims, losses, damages, costs, expenses and liabilities,
including reasonable legal fees, for bodily injury or death to any person, or
for damage or destruction of the property of third parties, arising out of or
caused by any act or omission of Customer, except to the extent caused by the
negligence or willful misconduct of CS, its agents, contractors, employees,
suppliers, licensees or invitees. CS will indemnify, protect, defend and hold
harmless Customer from and against all claims, losses, damages, costs, expenses
and liabilities, including reasonable legal fees, for bodily injury or death to
any person, or for damage or destruction of the property of third parties,
arising out of or caused by any act or omission of CS, except to the extent
caused by the negligence or willful misconduct by Customer, its agents,
contractors, employees, suppliers, licensees or invitees.

         (d)      INSURANCE. Customer shall maintain the following insurance
from nationally recognized insurance companies authorized to do business in the
State in which the Site to which the insurance relates is located having a
rating that is reasonably acceptable to CS: (a) comprehensive general liability
insurance for the Site, naming CS and its landlord as named insureds, with
aggregate and single occurrence limits of not less than $2,000,000.00, combined
single limits for bodily injury or death and property damage; (b) All Risk
Insurance in respect of the Equipment for full replacement value thereof, but
not less than $2,000,000; (c) business loss and interruption insurance in an
amount not less than that necessary to compensate Customer and its customers for
complete failure of Service; (d) employer's liability insurance in an amount not
less than $1,000,000.00 per occurrence; (e) workers' compensation insurance in
an amount not less than that required by applicable law. Customer also agrees
that it will be solely responsible for ensuring that its agents (including
contractors and subcontractors), its permitted assignees, licensees or
sublicensees, or its collocators, maintain such other insurance as is reasonably
required by CS or such other insurance as is customary in Customer's and such
other partys' industries, at levels no less than those required by applicable
law or as otherwise reasonably required by CS. Prior to installation of any
Equipment or otherwise upon CS's request, Customer shall deliver to CS
certificates of the above insurance, fully endorsed, in compliance herewith.

         (e)      CS shall maintain a General Liability policy with limits not
less than that of Customer and shall carry and maintain "All Risk" property
insurance covering the Premises and CS's equipment therein in an amount not less
than their full replacement cost.

8.       PROPRIETARY AND CONFIDENTIAL INFORMATION. Each party acknowledges and
agrees that any and all information emanating from the other's business in any
form shall be considered confidential and proprietary information (hereinafter
"Proprietary Information"), and each party agrees that it will not, during or
for three (3) years after the Term of this Agreement, duplicate, use or
disclose, or permit the duplication, use or disclosure, of any Proprietary
Information by or to any person not an employee or agent of the parties unless
(i) the express written consent of the other party is obtained prior to any
duplication, use or disclosure; (ii) any such Proprietary Information is a
matter of public knowledge through no wrongful act of the party; (iii) any such
Proprietary Information is previously and lawfully known to the party prior to
disclosure; (iv) any such Proprietary Information was obtained by a third party
who itself

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is lawfully in possession of such Proprietary Information and is not subject to
any obligation of confidentiality; (v) any such Proprietary Information is
independently developed hereafter by the party, provided it can show that such
development was accomplished by or on behalf of the party without the use of or
any reference to Proprietary Information; (vi) any such Proprietary Information
is disclosed by the other party to any third party without confidentiality
restriction on subsequent use or disclosure; or (vii) any such Proprietary
Information is disclosed by the party pursuant to judicial order or proper
Government regulations or other requirements, provided such party uses
reasonable efforts to notify the other party prior to such disclosure, and
cooperates with the other party in the event the other party elects to legally
restrict such disclosure.

9.       TRADEMARKS. Customer agrees that CS may refer to Customer by trade name
and trademark, and may briefly describe Customer's business in CS's marketing
materials only after obtaining Customer's prior written consent.

10.      ASSIGNMENT & SUBLICENSE. Customer shall not assign this Agreement
without the express written consent of CS, such consent not to be unreasonably
withheld or delayed, except that Customer shall be entitled to assign this
Agreement without obtaining CS's consent to a party with which or into which
Customer merges or to a party that acquires substantially all of Customer's
assets. Notwithstanding any assignment of this Agreement, whether with or
without the consent of CS, Customer shall nevertheless remain liable to CS for
all of the obligations of Customer hereunder. Customer shall be allowed to enter
into collocation agreements with third parties in connection with the Site
without CS's consent, provided, however, that prior to the commencement of any
such collocation, Customer has provided CS with a fully executed copy of such
collocation agreement and any other information CS may request in connection
therewith. Customer may redact any pricing information in the collocation
agreement. Any such collocation shall at all times be subject and subordinate to
the terms of this Agreement.

11.      FORCE MAJEURE. The parties shall not be liable to one another for any
failure to perform, or delays in the performance of, their respective
non-monetary obligations required hereunder if such delays or failures are due
to strikes, inclement weather, acts of God or other causes beyond the reasonable
control of the parties.

12.      PERSONAL PROPERTY. The Parties intend that Equipment shall be and
remain personal property of Customer, and CS shall have no right, title or
interest therein or thereto, notwithstanding the manner in which it may be
attached or affixed to real property.

13.      NOTICES. Any notice, statement, demand, consent, approval or other
communication required or permitted to be given rendered or made by either party
to other pursuant to the terms of this Agreement shall be in writing and shall
be deemed to have been properly given, rendered or made only if hand delivered,
delivered by any nationally recognized over-night delivery service or sent by
United States registered or certified mail, return receipt requested addressed
to the other party at the following address:

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         As to Customer:   Zix Corporation
                           2711 North Haskell Avenue, Suite 2300, LB 36
                           Dallas, Texas 75204
                           Attn: David Robertson - VP, Engineering

         As to CS:         Collocation Solutions, LLC
                           1950 Stemmons Freeway, Suite 2033
                           Dallas, Texas 75207
                           Attn: Richard Brown - Controller

         Any such notices shall be deemed to have been given, rendered or made
on the date received if delivered by hand, on the first (1st) business day after
the date placed for delivery with a nationally recognized overnight delivery
service, or on the third (3rd) business day after the date so mailed by United
States registered or certified mail. Either party may, by notice as aforesaid,
designate a different address or addressee for notices, statements, demands,
consents, approvals or other communications intended for it.

14.      MISCELLANEOUS.

         (a)      Any claim arising out of or related to this Agreement must be
brought no later than one (1) year after the same has accrued.

         (b)      This Agreement is an agreement for services and a license to
install and operate the Equipment at the Site only and is not intended to and
will at no time constitute a lease, sublease, or other occupancy of the
Premises, the Site or any other premises in the Building. In particular,
Customer acknowledges and agrees that Customer has not been granted any real
property interest in the Premises or the Site, and Customer has no rights as a
tenant or otherwise under any real property or landlord/tenant laws, regulations
or ordinances.

         (c)      Each party expressly acknowledges and agrees that the other
party has not made and is not making, and each party, in executing and
delivering this Agreement, is not relying upon, any warranties, representations,
promises or statements, except to the extent that the same are expressly set
forth in this Agreement or in any other written agreement(s) which may be made
between the parties concurrently with the execution and delivery of this
Agreement. All understandings and agreements heretofore had between the parties
regarding the subject matter hereof are merged in this Agreement and any other
written agreement(s) made concurrently herewith, which alone fully and
completely express the agreement of the parties and which are entered into after
full investigation. Neither party has relied upon any statement or
representation not embodied in this Agreement or in any other written
agreement(s) made concurrently herewith. Customer acknowledges and agrees that
none of the CS's affiliates, members, lenders or agents shall be responsible or
liable for any obligations or liabilities arising out of this Agreement and
Customer has not relied on the representations of any person or entity other
than CS in determining whether to enter into this Agreement.

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         (d)      No agreement shall be effective to change, modify, waive,
release, discharge, terminate or effect an alteration of this Agreement in whole
or in part, unless such agreement is in writing, refers expressly to this
Agreement and is signed by the party against whom enforcement of the change,
modification, waiver, release, discharge or termination is sought.

         (e)      Except as otherwise expressly provided in this Agreement, the
obligations under this Agreement shall bind and benefit the successors and
assigns of the parties hereto with the same effect as if mentioned in each
instance where a party is named or referred to.

         (f)      This Agreement shall be governed by and construed in
accordance with the laws of the State of Texas. If any provision of this
Agreement shall be invalid or unenforceable, the remainder of this Agreement
shall not be affected and shall be enforced to the extent permitted by law.

         (g)      The captions, headings and titles in this Agreement are solely
for convenience of reference and shall not affect its interpretation.

         (h)      If either party is a corporation, partnership, limited
liability company or other similar entity, each person executing this Agreement
on behalf of such party hereby covenants, represents and warrants that such
party is duly incorporated, organized or formed, and if incorporated, organized
or formed in a state other than Texas, is duly qualified and is authorized to do
business in the State of Texas; and that each person executing this Agreement on
behalf of such party is an officer or authorized agent of such party and is duly
authorized to execute, acknowledge and deliver this Agreement to the other
party.

         (i)      All Exhibits or Schedules to this Agreement are hereby
incorporated into this Agreement, and references to "this Agreement" shall
include all Exhibits or Schedules. In the event of any conflict between the
terms of this Agreement and the terms of any request for services (the "Service
Order"), the terms of the Agreement shall prevail.

         (j)      This Agreement may be executed in one or more counterparts,
each of which shall be original, and all of which shall constitute one and the
same instrument.

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         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first above written.

         COLLOCATION SOLUTIONS, LLC                ZIX CORPORATION
         By: /s/ Tim Moore                         By: /s/ Dave Robertson
            ------------------------                   -------------------------
         Name: Tim Moore                           Name: D. Robertson
         Title: V.P. Sales & Mktg.                 Title: VP - Engineering

                                       12<PAGE>

                                                                   EXHIBIT 10.34

                                      LEASE

                                 by and between

                                DUKE REALTY OHIO,
                         AN INDIANA GENERAL PARTNERSHIP

                                       and

                               POCKETSCRIPT, INC.,
                               AN OHIO CORPORATION

<PAGE>

                               OFFICE LEASE INDEX

<TABLE>
<S>                                                                                                                 <C>
ARTICLE 1 - LEASE OF PREMISES....................................................................................    1

   SECTION 1.01.  BASIC LEASE PROVISIONS AND DEFINITIONS.........................................................    1
   SECTION 1.02.  LEASE OF PREMISES..............................................................................    2

ARTICLE 2 - TERM AND POSSESSION..................................................................................    2

   SECTION 2.01.  TERM...........................................................................................    2
   SECTION 2.02.  CONSTRUCTION OF TENANT IMPROVEMENTS............................................................    2
   SECTION 2.03.  SURRENDER OF THE PREMISES......................................................................    3
   SECTION 2.04.  HOLDING OVER...................................................................................    3

ARTICLE 3 - RENT.................................................................................................    3

   SECTION 3.01.  BASE RENT......................................................................................    3
   SECTION 3.02.  ANNUAL RENTAL ADJUSTMENT DEFINITIONS...........................................................    3
   SECTION 3.03.  PAYMENT OF ADDITIONAL RENT.....................................................................    4
   SECTION 3.04.  LATE CHARGES...................................................................................    5
   SECTION 3.05.  MAXIMUM INCREASE IN OPERATING EXPENSES.........................................................    5

ARTICLE 4 - SECURITY DEPOSIT.....................................................................................    5

ARTICLE 5 - OCCUPANCY AND USE....................................................................................    5

   SECTION 5.01.  USE............................................................................................    5
   SECTION 5.02.  COVENANTS OF TENANT REGARDING USE..............................................................    5
   SECTION 5.03.  LANDLORD'S RIGHTS REGARDING USE................................................................    6

ARTICLE 6 - UTILITIES AND OTHER BUILDING SERVICES................................................................    6

   SECTION 6.01.  SERVICES TO BE PROVIDED........................................................................    6
   SECTION 6.02.  ADDITIONAL SERVICES............................................................................    7
   SECTION 6.03.  INTERRUPTION OF SERVICES.......................................................................    7

ARTICLE 7 - REPAIRS, MAINTENANCE AND ALTERATIONS.................................................................    7

   SECTION 7.01.  REPAIR AND MAINTENANCE OF BUILDING.............................................................    7
   SECTION 7.02.  REPAIR AND MAINTENANCE OF LEASED PREMISES......................................................    7
   SECTION 7.03.  ALTERATIONS....................................................................................    8

ARTICLE 8 - CASUALTY.............................................................................................    8

   SECTION 8.01.  CASUALTY.......................................................................................    8
   SECTION 8.02.  ALL RISK COVERAGE INSURANCE....................................................................    8

ARTICLE 9 - LIABILITY INSURANCE..................................................................................    9

   SECTION 9.01.  TENANT'S RESPONSIBILITY........................................................................    9
   SECTION 9.02.  TENANT'S INSURANCE.............................................................................    9
   SECTION 9.03.  LANDLORD'S RESPONSIBILITY......................................................................    9

ARTICLE 10 - EMINENT DOMAIN......................................................................................    9

ARTICLE 11 - ASSIGNMENT AND SUBLEASE.............................................................................   10

ARTICLE 12 - TRANSFERS BY LANDLORD...............................................................................   10

   SECTION 12.01.  SALE OF THE BUILDING..........................................................................   10
   SECTION 12.02.  SUBORDINATION AND ESTOPPEL CERTIFICATE........................................................   10

ARTICLE 13 - DEFAULT AND REMEDY..................................................................................   11

   SECTION 13.01.  DEFAULT.......................................................................................   11
   SECTION 13.02.  REMEDIES......................................................................................   11
   SECTION 13.03.  LANDLORD'S DEFAULT AND TENANT'S REMEDIES......................................................   12
   SECTION 13.04.  LIMITATION OF LANDLORD'S LIABILITY............................................................   12
   SECTION 13.05.  NONWAIVER OF DEFAULTS.........................................................................   12
   SECTION 13.06.  ATTORNEYS' FEES...............................................................................   12

ARTICLE 14 - LANDLORD'S RIGHT TO RELOCATE TENANT.................................................................   13
</TABLE>

<PAGE>

<TABLE>
<S>                                                                                                                 <C>
ARTICLE 15 - TENANT'S RESPONSIBILITY REGARDING ENVIRONMENTAL LAWS AND HAZARDOUS SUBSTANCES.......................   13

   SECTION 15.01.  ENVIRONMENTAL DEFINITIONS.....................................................................   13
   SECTION 15.02.  COMPLIANCE....................................................................................   13
   SECTION 15.03.  RESTRICTIONS ON TENANT........................................................................   13
   SECTION 15.04.  NOTICES, AFFIDAVITS, ETC......................................................................   13
   SECTION 15.05.  LANDLORD'S RIGHTS.............................................................................   14
   SECTION 15.06.  TENANT'S INDEMNIFICATION......................................................................   14
   SECTION 15.07.  EXISTING CONDITIONS...........................................................................   14

ARTICLE 16 - MISCELLANEOUS.......................................................................................   14

   SECTION 16.01.  BENEFIT OF LANDLORD AND TENANT................................................................   14
   SECTION 16.02.  GOVERNING LAW.................................................................................   14
   SECTION 16.03.  GUARANTY......................................................................................   14
   SECTION 16.04.  FORCE MAJEURE.................................................................................   14
   SECTION 16.05.  EXAMINATION OF LEASE..........................................................................   14
   SECTION 16.06.  INDEMNIFICATION FOR LEASING COMMISSIONS.......................................................   15
   SECTION 16.07.  NOTICES.......................................................................................   15
   SECTION 16.08.  PARTIAL INVALIDITY; COMPLETE AGREEMENT........................................................   15
   SECTION 16.09.  FINANCIAL STATEMENTS..........................................................................   15
   SECTION 16.10.  REPRESENTATIONS AND WARRANTIES................................................................   15
   SECTION 16.11.  AGENCY DISCLOSURE.............................................................................   15
   SECTION 16.12.  OPTION TO TERMINATE...........................................................................   15
</TABLE>

EXHIBITS

    Exhibit A - Leased Premises

    Exhibit B - Tenant Improvements

    Exhibit C - Rules and Regulations

    Exhibit D - Form of Unconditional Guaranty of Lease
<PAGE>

SEW/ACD/md/nm/dn
2/25/04

THIS LEASE is executed this 9 day of March, 2004, by and between DUKE REALTY
OHIO, an Indiana general partnership ("Landlord"), and POCKETSCRIPT, INC., an
Ohio corporation ("Tenant").

ARTICLE 1 - LEASE OF PREMISES

Section 1.01.  Basic Lease Provisions and Definitions.

A.       Leased Premises (shown outlined on Exhibit A attached hereto): Suite:
         207; Floor: 2nd; Building Name: 4770 Governor's Pointe; Address: 4770
         Duke Drive, Mason, Ohio 45040 ("Building");

B.       Rentable Area: approximately 5,608 rentable square feet;

         Landlord shall use commercially reasonable standards, consistently
         applied, in determining the Rentable Area and the rentable area of the
         Building. The Rentable Area shall include the area within the Leased
         Premises plus a pro rata portion of the area covered by the common
         areas within the Building, as reasonably determined by Landlord from
         time to time. Landlord's determination of Rentable Area shall be deemed
         correct for all purposes hereunder.

C.       Building Expense Percentage: 7.38%;

D.       Minimum Annual Rent:

         May 1, 2004 - August 31, 2004             $     0.00 (4 months)
         September 1, 2004 - April 30, 2005        $36,452.00 (8 months)
         May 1, 2005 - April 30, 2006              $56,360.40 per year
         May 1, 2006 - April 30, 2007              $58,042.80 per year
         May 1, 2007 - April 30, 2008              $59,725.20 per year
         May 1, 2008 - April 30, 2009              $61,407.60 per year
         May 1, 2009 - August 31, 2009             $21,030.00 (4 months);

E.       Monthly Rental Installments:

         May 1, 2004 - August 31, 2004             $      0.00 per month
         September 1, 2004 - April 30, 2005        $  4,556.50 per month
         May 1, 2005 - April 30, 2006              $  4,696.70 per month
         May 1, 2006 - April 30, 2007              $  4,836.90 per month
         May 1, 2007 - April 30, 2008              $  4,977.10 per month
         May 1, 2008 - April 30, 2009              $  5,117.30 per month
         May 1, 2009 - August 31, 2009             $  5,257.50 per month;

F.       Term: Five (5) years and four (4) months;

G.       Target Commencement Date: May 1, 2004;

H.       Security Deposit: $4,556.50;

I.       Brokers: Duke Realty Services Limited Partnership representing Landlord
         and The Staubach Company representing Tenant;

J.       Permitted Use: General office purposes;

<PAGE>

K.       Address for payments and notices as follows:

         Landlord:                  Duke Realty Ohio
                                    Attn:  Senior Property Manager
                                    4555 Lake Forest Drive, Suite 400
                                    Cincinnati, OH  45242

         With Rental
         Payments to:               Duke Realty Ohio
                                    75 Remittance Drive, Suite 3205
                                    Chicago, IL  60675-3205

         Tenant:                    PocketScript, Inc.
                                    4770 Duke Drive, Suite 207
                                    Mason, OH  45040

                                    Copy to:

                                    Zix Corporation
                                    Attn:  Accounts Payable
                                    2711 N. Haskell Avenue, Suite 2300
                                    Dallas, TX  75204-2960

L.       Guarantor: Zix Corporation, a Texas corporation.

Section 1.02. Lease of Premises.

Landlord hereby leases to Tenant and Tenant hereby leases from Landlord under
the terms and conditions herein the Leased Premises.

ARTICLE 2 - TERM AND POSSESSION

Section 2.01. Term.

The term of this Lease ("Lease Term") shall be for the period of time as set
forth in Section 1.01(F) hereof, and shall commence on the date (the
"Commencement Date") that is the later to occur of (i) the Target Commencement
Date; or (ii) substantial completion of the Tenant Improvements (as hereinafter
defined); provided, however, that such date shall not be extended as a result of
any Tenant-caused delays or change orders. Substantial completion shall mean the
date on which the Tenant Improvements have been completed in accordance with
Exhibit B, subject only to minor punchlist items which do not substantially
interfere with Tenant's use of the Leased Premises.

Section 2.02. Construction of Tenant Improvements.

(a)      Tenant has personally inspected the Leased Premises and accepts the
         same "AS IS" without representation or warranty by Landlord of any kind
         and with the understanding that Landlord shall have no responsibility
         with respect thereto except to construct in a good and workmanlike
         manner the improvements described on Exhibit B attached hereto and made
         a part hereof (the "Tenant Improvements").

(b)      Promptly following the Commencement Date, Tenant shall execute
         Landlord's Letter of Understanding, acknowledging, among other things,
         that Tenant has accepted the Leased Premises. If Tenant takes
         possession of and occupies the Leased Premises, then, subject to
         subsection (a) above, Tenant shall be deemed to have accepted the
         Leased Premises and that the condition of the Leased Premises and the
         Building was at the time satisfactory and in conformity with the
         provisions of this Lease in all respects.

                                      -2-

<PAGE>

Section 2.03. Surrender of the Premises.

Upon the expiration or earlier termination of this Lease, Tenant shall
immediately surrender the Leased Premises to Landlord in broom-clean condition
and in good order, condition and repair, reasonable wear and tear excepted.
Tenant shall remove its personal property, computer equipment, wiring and
cabling (including above ceiling) in the Leased Premises, at its sole cost and
expense. Tenant shall, at its expense, promptly repair any damage caused by any
such removal, and shall restore the Leased Premises to the condition existing
upon the Commencement Date, reasonable wear and tear excepted. All Tenant
property which is not removed within ten (10) days following Landlord's written
demand therefore shall be conclusively deemed to have been abandoned and
Landlord shall be entitled to dispose of such property at Tenant's cost without
incurring any liability to Tenant. The provisions of this section shall survive
the expiration or other termination of this Lease.

Section 2.04. Holding Over.

If Tenant retains possession of the Leased Premises after the expiration or
earlier termination of this Lease, unless otherwise agreed in writing by
Landlord, Tenant shall become a tenant from month to month at one hundred fifty
percent (150%) of the Monthly Rental Installment and Annual Rental Adjustment
for the Leased Premises in effect upon the date of such expiration or earlier
termination, and otherwise upon the terms, covenants and conditions herein
specified, so far as applicable. Acceptance by Landlord of rent after such
expiration or earlier termination shall not result in a renewal of this Lease.
Tenant shall vacate and surrender the Leased Premises to Landlord upon Tenant
being given thirty (30) days' prior written notice from Landlord to vacate
whether or not said notice is given on the rent paying date. This Section 2.04
shall in no way constitute a consent by Landlord to any holding over by Tenant
upon the expiration or earlier termination of this Lease, nor limit Landlord's
remedies in such event.

ARTICLE 3 - RENT

Section 3.01. Base Rent.

Tenant shall pay to Landlord the Minimum Annual Rent in the Monthly Rental
Installments in advance, without deduction or offset on the Commencement Date
and on or before the first day of each and every calendar month thereafter
during the Lease Term. The Monthly Rental Installments for partial calendar
months shall be prorated.

Section 3.02. Annual Rental Adjustment Definitions.

A.       "Annual Rental Adjustment" - shall mean the amount of Tenant's
         Proportionate Share of Operating Expenses for a particular calendar
         year.

B.       "Operating Expenses" - shall mean the amount of all of Landlord's costs
         and expenses paid or incurred in operating, repairing, replacing and
         maintaining the Building (including the Common Areas as defined below)
         in good condition and repair for a particular calendar year, including
         all additional costs and expenses which Landlord reasonably determines
         that it would have paid or incurred during such year if the Building
         had been fully occupied, including by way of illustration and not
         limitation: all Real Estate Taxes, as hereinafter defined, insurance
         premiums and deductibles; water, sewer, electrical and other utility
         charges other than the separately billed electrical and other charges
         paid by Tenant as provided in this Lease (or other tenants in the
         Building); service and other charges incurred in the repair,
         replacement, operation and maintenance of the elevators and the
         heating, ventilation and air-conditioning system; costs associated with
         providing fitness facilities, if any; cleaning and other janitorial
         services; tools and supplies; repair costs; landscape maintenance
         costs; security services; license, permit and inspection fees;
         management or administrative fees; supplies, costs, wages and related
         employee benefits payable for the management, maintenance and operation
         of the Building; maintenance, repair and replacement of the driveways,
         parking and sidewalk areas (including snow and ice removal), landscaped
         areas, and lighting; maintenance and repair costs, dues, fees and
         assessments incurred under any covenants or owners association (the
         "Covenants"). The

                                      -3-

<PAGE>

         cost of any capital improvement shall be amortized over the useful life
         of such improvement (as reasonably determined by Landlord), and only
         the amortized portion shall be included in Operating Expenses.
         Operating Expenses shall not include the following:

         1.       Leasing commissions.

         2.       The cost of tenant finish improvements provided solely for the
                  benefit of other tenants or proposed tenants in the Building.

         3.       Costs of correcting building code violations which violations
                  were in existence on the Commencement Date.

         4.       Depreciation on the Building.

         5.       The cost of services separately charged to and paid by another
                  tenant in the Building.

         6.       Interest payments and financing costs associated with Building
                  financing.

         7.       Legal fees associated with the preparation, interpretation
                  and/or enforcement of leases.

         8.       Repairs and replacements for which and to the extent that
                  Landlord has been reimbursed by insurance and/or paid pursuant
                  to warranties.

         9.       Advertising and promotional expenses.

         10.      Costs representing amounts paid to an affiliate of Landlord
                  for services or materials which are in excess of the amounts
                  which would have been paid in the absence of such
                  relationship.

         11.      Costs of the Tenant Improvements.

C.       "Tenant's Proportionate Share of Operating Expenses" - shall be an
         amount equal to the product of Tenant's Building Expense Percentage
         times the Building Operating Expenses.

D.       "Real Estate Taxes" - shall include any form of real estate tax or
         assessment or service payments in lieu thereof, and any license fee,
         commercial rental tax, improvement bond or other similar charge or tax
         (other than inheritance, personal income or estate taxes) imposed upon
         the Building or Common Areas (hereinafter defined) (or against
         Landlord's business of leasing the Building) by any authority having
         the power to so charge or tax, together with the actual costs and
         expenses (including legal and other fees) of contesting the validity or
         amount of Real Estate Taxes.

 E.      "Common Areas" - shall mean the areas of the Building and the land
         which are designed for use in common by all tenants of the Building and
         their respective employees, agents, customers, invitees and others, and
         includes, by way of illustration and not limitation, entrances and
         exits, hallways and stairwells, conference facilities, if any,
         elevators, restrooms, sidewalks, driveways, parking areas, landscaped
         areas and other areas as may be designated by Landlord as part of the
         Common Areas of the Building. Tenant shall have the non-exclusive
         right, in common with others, to the use of the Common Areas.

Section 3.03. Payment of Additional Rent.

In addition to the Minimum Annual Rent specified in this Lease, Tenant shall pay
to Landlord as "Additional Rent" for the Leased Premises, in each calendar year
or partial calendar year, during the Lease Term, an amount equal to the Annual
Rental Adjustment for such calendar year. The Annual Rental Adjustment shall be
estimated annually by Landlord, and written notice thereof shall be given to
Tenant prior to the beginning of each calendar year. Tenant shall pay to
Landlord each month, at the same time the Monthly Rental Installment is due, an
amount equal

                                      -4-

<PAGE>

to one-twelfth (1/12) of the estimated Annual Rental Adjustment. If Real Estate
Taxes or the cost of utility or janitorial services increase during a calendar
year, Landlord may increase the estimated Annual Rental Adjustment during such
year by giving Tenant written notice to that effect, and thereafter Tenant shall
pay to Landlord, in each of the remaining months of such year, an amount equal
to the amount of such increase in the estimated Annual Rental Adjustment divided
by the number of months remaining in such year. Within a reasonable time after
the end of each calendar year, Landlord shall prepare and deliver to Tenant a
statement showing the actual Annual Rental Adjustment. Within thirty (30) days
after receipt of the aforementioned statement, Tenant shall pay to Landlord, or
Landlord shall credit against the next rent payment or payments due from Tenant,
as the case may be, the difference between the actual Annual Rental Adjustment
for the preceding calendar year and the estimated amount paid by Tenant during
such year.

Section 3.04. Late Charges.

Tenant acknowledges that Landlord shall incur certain additional unanticipated
administrative and legal costs and expenses if Tenant fails to timely pay any
payment required hereunder. Therefore, in addition to the other remedies
available to Landlord hereunder, if any payment required to be paid by Tenant to
Landlord hereunder shall become overdue, such unpaid amount shall bear interest
from the due date thereof to the date of payment at the prime rate (as reported
in the Wall Street Journal) of interest ("Prime Rate") plus six percent (6%) per
annum.

Section 3.05. Maximum Increase in Operating Expenses.

Notwithstanding anything in this Lease to the contrary, Tenant will be
responsible for Tenant's Proportionate Share of Real Estate Taxes, including the
reasonable costs and expenses of contesting the validity or amount of Real
Estate Taxes, service payments in lieu of Real Estate Taxes, insurance premiums,
utilities, snow removal, management fees and covenants or owners association
fees and assessments ("Uncontrollable Expenses"), without regard to the level of
increase in any or all of the above in any year or other period of time.
Tenant's obligation to pay all other Building Operating Expenses which are not
Uncontrollable Expenses (herein "Controllable Expenses") shall be limited to a
five percent (5%) per annum increase over the amount the Controllable Expenses
for the immediately preceding calendar year would have been had the Controllable
Expenses increased at the rate of five percent (5%) in all previous calendar
years beginning with the actual Controllable Expenses for the year ending
December 31, 2004.

ARTICLE 4 - SECURITY DEPOSIT

Upon execution of this Lease, Tenant shall deposit with Landlord the Security
Deposit as security for the performance by Tenant of all of Tenant's obligations
contained in this Lease. In the event of a default by Tenant, Landlord may apply
all or any part of the Security Deposit to cure all or any part of such default;
and Tenant agrees to promptly, upon demand, deposit such additional sum with
Landlord as may be required to maintain the full amount of the Security Deposit.
All sums held by Landlord pursuant to this section shall be without interest and
may be commingled by Landlord. At the end of the Lease Term, Landlord shall
return the Security Deposit to Tenant, less any amounts required to cure any
Tenant defaults.

ARTICLE 5 - OCCUPANCY AND USE

Section 5.01. Use.

The Leased Premises shall be used by Tenant for the Permitted Use and for no
other purposes without the prior written consent of Landlord.

Section 5.02. Covenants of Tenant Regarding Use.

Tenant shall (i) use and maintain the Leased Premises and conduct its business
thereon in a safe, careful, reputable and lawful manner, (ii) comply with the
Covenants and all laws, rules, regulations, orders, ordinances, directions and
requirements of any governmental authority or agency, now in force or which may
hereafter be in force, including without limitation those which shall impose
upon Landlord or Tenant any duty with respect to or triggered by a change in

                                      -5-

<PAGE>

the use or occupation of, or any improvement or alteration to, the Leased
Premises, (iii) comply with and obey all reasonable directions of Landlord,
including the Building Rules and Regulations attached hereto as Exhibit C and as
may be modified from time to time by Landlord on reasonable notice to Tenant.
Tenant shall not do or permit anything to be done in or about the Leased
Premises which will in any way obstruct or interfere with the rights of other
tenants or occupants of the Building or injure or annoy them. Landlord shall not
be responsible to Tenant for the non-performance by any other tenant or occupant
of the Building of any of the Building Rules and Regulations, but agrees to take
reasonable measures to assure such other tenant's compliance. Tenant shall not
use the Leased Premises, or allow the Leased Premises to be used, for any
purpose or in any manner which would invalidate any policy of insurance now or
hereafter carried on the Building or increase the rate of premiums payable on
any such insurance policy unless Tenant reimburses Landlord for any increase in
premium charged.

Section 5.03. Landlord's Rights Regarding Use.

In addition to the rights specified elsewhere in this Lease, Landlord shall have
the following rights regarding the use of the Leased Premises or the Common
Areas, each of which may be exercised without notice or liability to Tenant: (a)
Landlord may install such signs, advertisements or notices or tenant
identification information on the directory board or tenant access doors as it
shall deem necessary or proper; (b) Landlord shall have the right at any time to
control, change or otherwise alter the Common Areas in such manner as it deems
necessary or proper; (c) Landlord, its employees and agents and any mortgagee of
the Building shall have the right to enter any part of the Leased Premises at
reasonable times upon reasonable notice except in the event of an emergency
where no notice shall be required for the purposes of examining or inspecting
the same, showing the same to prospective purchasers, mortgagees or tenants and
making such repairs, alterations or improvements to the Leased Premises or the
Building as Landlord may deem necessary or desirable, provided, however, that
any repairs made by Landlord shall be at Tenant's expense except as provided in
Section 7.02 hereof. Landlord shall incur no liability to Tenant for such entry,
nor shall such entry constitute an eviction of Tenant or a termination of this
Lease, or entitle Tenant to any abatement of rent therefor.

ARTICLE 6 - UTILITIES AND OTHER BUILDING SERVICES

Section 6.01. Services to be Provided.

Provided Tenant is not in default, Landlord shall furnish to Tenant, except as
noted below, the following utilities and other building services to the extent
reasonably necessary for Tenant's comfortable use and occupancy of the Leased
Premises for the Permitted Use or as may be required by law or directed by
governmental authority:

(a)      Heating, ventilation and air-conditioning between the hours of 8:00
         a.m. and 6:00 p.m. Monday through Friday and 9:00 a.m. to 1:00 p.m. on
         Saturday of each week except on legal holidays;

(b)      Electrical current for lighting and office equipment usage not to
         exceed four (4) watts per square foot;

(c)      Water in the Common Areas for lavatory and drinking purposes;

(d)      Automatic elevator service;

(e)      Cleaning and janitorial service in the Leased Premises and Common Areas
         on Monday through Friday of each week except legal holidays; provided,
         however, Tenant shall be responsible for carpet cleaning other than
         routine vacuuming;

(f)      Washing of windows at intervals reasonably established by Landlord;

(g)      Replacement of all lamps, bulbs, starters and ballasts in Building
         standard lighting as required from time to time as a result of normal
         usage;

                                      -6-

<PAGE>

(h)      Cleaning and maintenance of the Common Areas, including the removal of
         rubbish, ice and snow; and

(i)      Repair and maintenance to the extent specified elsewhere in this Lease.

In the event of utility deregulation, Landlord may choose the utility service
provider.

Section 6.02. Additional Services.

If Tenant requests utilities or building services in addition to those
identified above or any of the above utilities or building services in
frequency, scope, quality or quantity substantially greater than those which
Landlord determines are normally required by other tenants in the Building for
the Permitted Use, then Landlord shall use reasonable efforts to attempt to
furnish Tenant with such additional utilities or building services. In the event
Landlord is able to and does furnish such additional utilities or building
services, the costs thereof shall be borne by Tenant, who shall reimburse
Landlord monthly for the same as Additional Rent at the same time Monthly Rental
Installments and other Additional Rent is due.

If any lights, density of staff, machines or equipment used by Tenant in the
Leased Premises materially affect the temperature otherwise maintained by the
Building's air-conditioning system or generate substantially more heat in the
Leased Premises than that which would normally be generated by that typically
used by other tenants in the Building or by tenants in comparable office
buildings, then Landlord shall have the right to install any machinery or
equipment which Landlord considers reasonably necessary in order to restore the
temperature balance between the Leased Premises and the rest of the Building,
including equipment which modifies the Building's air-conditioning system. All
costs expended by Landlord to install any such machinery and equipment and any
additional costs of operation and maintenance in connection therewith shall be
borne by Tenant, who shall reimburse Landlord for the same as provided in this
Section 6.02.

Section 6.03. Interruption of Services.

Tenant understands, acknowledges and agrees that any one or more of the
utilities or other Building services identified in Sections 6.01, 6.02 or
otherwise hereunder may be interrupted by reason of accident, emergency or other
causes beyond Landlord's control, or may be discontinued or diminished
temporarily by Landlord or other persons until certain repairs, alterations or
improvements can be made. Landlord shall not be liable in damages or otherwise
for any failure or interruption of any utility service and no such failure or
interruption shall entitle Tenant to terminate this Lease or withhold sums due
hereunder.

ARTICLE 7 - REPAIRS, MAINTENANCE AND ALTERATIONS

Section 7.01. Repair and Maintenance of Building.

Subject to Section 7.02 and except for any repairs made necessary by the
negligence, misuse, or default of Tenant, its employees, agents, customers and
invitees, Landlord shall make all necessary repairs to the roofs, exterior
walls, exterior doors, windows, corridors and other Common Areas, and Landlord
shall keep the Building in a safe, clean and neat condition and use reasonable
efforts to keep all equipment used in common with other tenants in good
condition and repair.

Section 7.02. Repair and Maintenance of Leased Premises.

Landlord shall keep and maintain the Leased Premises in good order, condition
and repair. Except for ordinary wear and tear and damage which Tenant is not
obligated to repair as provided elsewhere in this Lease, the cost of all repairs
and maintenance to the Leased Premises shall be borne by Tenant (except as
provided in Section 7.02 hereof), who shall be separately billed and shall
reimburse Landlord for the same as Additional Rent, or as a part of Operating
Expenses.

                                      -7-

<PAGE>

Section 7.03. Alterations.

Tenant shall not permit alterations in or to the Leased Premises unless and
until the plans have been approved by Landlord in writing. As a condition of
such approval, Landlord may require Tenant to remove the alterations and restore
the Leased Premises upon termination of this Lease to the condition existing
upon the Commencement Date, reasonable wear and tear excepted; otherwise, all
such alterations shall at Landlord's option become a part of the realty and the
property of Landlord, and shall not be removed by Tenant. Tenant shall ensure
that all alterations shall be made in accordance with all applicable laws,
regulations and building codes, in a good and workmanlike manner and of quality
equal to or better than the original construction of the Building. Upon
completion of the work, Tenant shall provide lien waivers from the
subcontractors or a final affidavit of lien waiver from the general contractor,
and such lien waiver shall be in a form acceptable to Landlord. No person shall
be entitled to any lien derived through or under Tenant for any labor or
material furnished to the Leased Premises, and nothing in this Lease shall be
construed to constitute a consent by Landlord to the creation of any lien. If
any lien is filed against the Leased Premises for work claimed to have been done
for or material claimed to have been furnished to Tenant, Tenant shall cause
such lien to be discharged of record within thirty (30) days after filing.
Tenant shall indemnify Landlord from all costs, losses, expenses and attorneys'
fees in connection with any construction or alteration and any related lien.

ARTICLE 8 - CASUALTY

Section 8.01. Casualty.

In the event of total or partial destruction of the Building or the Leased
Premises by fire or other casualty, Landlord agrees to promptly restore and
repair same; provided, however, Landlord's obligation hereunder shall be limited
to the reconstruction of such of the tenant finish improvements as were
originally required to be made by Landlord, if any. Rent shall proportionately
abate during the time that the Leased Premises or part thereof are unusable
because of any such damage. Notwithstanding the foregoing, if the Leased
Premises are (i) so destroyed that they cannot be repaired or rebuilt within one
hundred eighty (180) days from the casualty date; or (ii) destroyed by a
casualty which is not covered by the insurance required hereunder or, if
covered, such insurance proceeds are not released by any mortgagee entitled
thereto or are insufficient to rebuild the Building and the Leased Premises;
then, in case of a clause (i) casualty, either Landlord or Tenant may, or, in
the case of a clause (ii) casualty, then Landlord may, upon thirty (30) days'
written notice to the other party, terminate this Lease with respect to matters
thereafter accruing.

Section 8.02. All Risk Coverage Insurance.

During the Lease Term, Landlord shall maintain all risk coverage insurance on
the Building, but shall not protect Tenant's property on the Leased Premises;
and, notwithstanding the provisions of Section 9.01 and Section 9.03, neither
party shall be liable for any casualty damage to the other's property,
regardless of cause, including the negligence of either party and its employees,
agents and invitees. Tenant hereby expressly waives any right of recovery
against Landlord for casualty damage to any property of Tenant located in or
about the Leased Premises, however caused, including the negligence of Landlord
and its employees, agents and invitees. Notwithstanding the provisions of
Section 9.01 below, Landlord hereby expressly waives any rights of recovery
against Tenant for casualty damage to the Leased Premises or the Building,
however caused, including the negligence of Landlord and its employees, agents
and invitees. All insurance policies maintained by Landlord or Tenant as
provided in this Lease shall contain an agreement by the insurer waiving the
insurer's right of subrogation against the other party to this Lease.

                                      -8-

<PAGE>

ARTICLE 9 - LIABILITY INSURANCE

Section 9.01. Tenant's Responsibility.

Tenant shall assume the risk of, be responsible for, have the obligation to
insure against, and indemnify Landlord and hold it harmless from any and all
liability for any loss of or damage or injury to any person (including death
resulting therefrom) or property occurring in the Leased Premises, regardless of
cause, except for any loss or damage covered by Landlord's all risk coverage
insurance as provided in Section 8.02 and except for that caused directly by the
sole negligence of Landlord or its employees, agents, customers or invitees; and
Tenant hereby releases Landlord from any and all liability for the same.
Tenant's obligation to indemnify Landlord hereunder shall include the duty to
defend against any claims asserted by reason of such loss, damage or injury and
to pay any judgments, settlements, costs, fees and expenses, including
reasonable attorneys' fees, incurred in connection therewith. This provision
shall survive the expiration or earlier termination of this Lease.

Section 9.02. Tenant's Insurance.

Tenant shall carry general public liability and property damage insurance,
issued by one or more insurance companies reasonably acceptable to Landlord,
with the following minimum coverages:

(a)      Worker's Compensation: minimum statutory amount.

(b)      Commercial General Liability Insurance, including blanket, contractual
         liability, broad form property damage, personal injury, completed
         operations, products liability, and fire damage: Not less than
         $3,000,000 Combined Single Limit for both bodily injury and property
         damage.

(c)      All Risk Coverage, Vandalism and Malicious Mischief, and Sprinkler
         Leakage insurance, if applicable, for the full cost of replacement of
         Tenant's property.

(d)      Business interruption insurance.

The insurance policies shall protect Tenant and Landlord as their interests may
appear, naming Landlord and Landlord's managing agent and mortgagee as
additional insureds, and shall provide that they may not be canceled on less
than thirty (30) days' prior written notice to Landlord. Tenant shall furnish
Landlord with Certificates of Insurance evidencing all required coverages on or
before the Commencement Date. If Tenant fails to carry such insurance and
furnish Landlord with such Certificates of Insurance after a request to do so,
Landlord may obtain such insurance and collect the cost thereof from Tenant.

Section 9.03. Landlord's Responsibility.

Landlord shall assume the risk of, be responsible for, have the obligation to
insure against, and indemnify Tenant and hold it harmless from any and all
liability for any loss of or damage or injury to any person (including death
resulting therefrom) or property (other than Tenant's property as provided in
Section 8.02) occurring in, on or about the Common Areas, regardless of cause,
except for that caused by the sole negligence of Tenant or its employees,
agents, customers or invitees; and Landlord hereby releases Tenant from any and
all liability for the same. Landlord's obligation to indemnify Tenant hereunder
shall include the duty to defend against any claims asserted by reason of such
loss, damage or injury and to pay any judgments, settlements, costs, fees and
expenses, including reasonable attorneys' fees, incurred in connection
therewith. This provision shall survive the expiration or earlier termination of
this Lease.

ARTICLE 10 - EMINENT DOMAIN

If all or any substantial part of the Building or Common Areas shall be acquired
by the exercise of eminent domain, Landlord may terminate this Lease by giving
written notice to Tenant on or before the date possession thereof is so taken.
If all or any part of the Leased Premises shall be acquired by the exercise of
eminent domain so that the Leased Premises shall become unusable

                                      -9-

<PAGE>

by Tenant for the Permitted Use, Tenant may terminate this Lease by giving
written notice to Landlord as of the date possession thereof is so taken. All
damages awarded shall belong to Landlord; provided, however, that Tenant may
claim dislocation damages if such amount is not subtracted from Landlord's
award.

ARTICLE 11 - ASSIGNMENT AND SUBLEASE

Tenant shall not assign this Lease or sublet the Leased Premises in whole or in
part without Landlord's prior written consent, which consent shall not be
unreasonably withheld, delayed or denied. If Tenant desires to assign or
sublease this Lease to any entity or individual unrelated to Tenant, then Tenant
shall provide Landlord with six (6) months prior written notice of its desire to
assign this Lease or sublease the Leased Premises. Landlord, at its option,
shall have six (6) months after receipt of such notice to try to assign the
Lease or sublease the Leased Premises prior to Tenant's marketing of the Lease
or Leased Premises for assignment or sublease. In the event of any permitted
assignment or subletting, Tenant shall remain primarily liable hereunder, and
any building signage, extension, expansion, rights of first offer, rights of
first refusal or other options granted to Tenant under this Lease shall be
rendered void and of no further force or effect. The acceptance of rent from any
other person shall not be deemed to be a waiver of any of the provisions of this
Lease or to be a consent to the assignment of this Lease or the subletting of
the Leased Premises. Without in any way limiting Landlord's right to refuse to
consent to any assignment or subletting of this Lease, Landlord reserves the
right to refuse to give such consent if in Landlord's opinion (i) the Leased
Premises are or may be in any way adversely affected; (ii) the business
reputation of the proposed assignee or subtenant is unacceptable; (iii) the
financial worth of the proposed assignee or subtenant is insufficient to meet
the obligations hereunder; or (iv) the proposed assignee or subtenant is a
prospective tenant reviewing a proposal from Landlord. Landlord further
expressly reserves the right to refuse to give its consent to any subletting if
the proposed rent is to be less than the then current rent for similar premises
in the Building, or if the proposed assignee or subtenant is an existing tenant
in the Building or in Governor's Pointe. If Landlord refuses to give its consent
to any proposed assignment or subletting, Landlord may, at its option, within
thirty (30) days after receiving a request to consent, terminate this Lease by
giving Tenant thirty (30) days' prior written notice of such termination,
whereupon each party shall be released from all further obligations and
liability hereunder. In no event shall Tenant sublease the Leased Premises in
whole or in part for a per square foot rental rate less than the per square foot
rental rate hereunder. If Tenant shall make any assignment or sublease, with
Landlord's consent, for a rental in excess of the rent payable under this Lease,
Tenant shall pay to Landlord fifty percent (50%) of any such excess rental upon
receipt. Tenant agrees to reimburse Landlord for reasonable accounting and
attorneys' fees incurred in conjunction with the processing and documentation of
any requested assignment, subletting or any other hypothecation of this Lease or
Tenant's interest in and to the Leased Premises.

ARTICLE 12 - TRANSFERS BY LANDLORD

Section 12.01. Sale of the Building.

Landlord shall have the right to sell the Building at any time during the Lease
Term, subject only to the rights of Tenant hereunder; and such sale shall
operate to release Landlord from liability hereunder after the date of such
conveyance.

Section 12.02. Subordination and Estoppel Certificate.

Landlord shall have the right to subordinate this Lease to any mortgage
presently existing or hereafter placed upon the Building by so declaring in such
mortgage. Within ten (10) days following receipt of a written request from
Landlord, Tenant shall execute and deliver to Landlord, without cost, any
instrument which Landlord deems reasonably necessary or desirable to confirm the
subordination of this Lease and an estoppel certificate in such form as Landlord
may reasonably request certifying (i) that this Lease is in full force and
effect and unmodified or stating the nature of any modification, (ii) the date
to which rent has been paid, (iii) that there are not, to Tenant's knowledge,
any uncured defaults or specifying such defaults if any are claimed, and (iv)
any other matters or state of facts reasonably required respecting the Lease.
Such estoppel may be relied upon by Landlord and by any purchaser or mortgagee
of the Building.

                                      -10-

<PAGE>

Notwithstanding the foregoing, if the mortgagee shall take title to the Leased
Premises through foreclosure or deed in lieu of foreclosure, Tenant shall be
allowed to continue in possession of the Leased Premises as provided for in this
Lease so long as Tenant shall not be in default.

ARTICLE 13 - DEFAULT AND REMEDY

Section 13.01. Default.

The occurrence of any of the following shall be a "Default":

(a)      Tenant fails to pay any Monthly Rental Installment or Additional Rent
         within five (5) days after the same is due, or Tenant fails to pay any
         other amounts due Landlord from Tenant within ten (10) days after the
         same is due.

(b)      Tenant fails to perform or observe any other term, condition, covenant
         or obligation required under this Lease for a period of thirty (30)
         days after notice thereof from Landlord; provided, however, that if the
         nature of Tenant's default is such that more than thirty (30) days are
         reasonably required to cure, then such default shall be deemed to have
         been cured if Tenant commences such performance within said thirty (30)
         day period and thereafter diligently completes the required action
         within a reasonable time.

(c)      Tenant shall vacate or abandon the Leased Premises, or fail to occupy
         the Leased Premises or any substantial portion thereof for a period of
         thirty (30) days.

(d)      Tenant shall assign or sublet all or a portion of the Leased Premises
         in contravention of the provisions of Article 11 of this Lease.

(e)      All or substantially all of Tenant's assets in the Leased Premises or
         Tenant's interest in this Lease are attached or levied under execution
         (and Tenant does not discharge the same within sixty (60) days
         thereafter); a petition in bankruptcy, insolvency or for reorganization
         or arrangement is filed by or against Tenant (and Tenant fails to
         secure a stay or discharge thereof within sixty (60) days thereafter);
         Tenant is insolvent and unable to pay its debts as they become due;
         Tenant makes a general assignment for the benefit of creditors; Tenant
         takes the benefit of any insolvency action or law; the appointment of a
         receiver or trustee in bankruptcy for Tenant or its assets if such
         receivership has not been vacated or set aside within thirty (30) days
         thereafter; or, dissolution or other termination of Tenant's corporate
         charter if Tenant is a corporation.

Section 13.02. Remedies.

Upon the occurrence of any Default, Landlord shall have the following rights and
remedies, in addition to those allowed by law or in equity, any one or more of
which may be exercised without further notice to Tenant:

(a)      Landlord may apply the Security Deposit or re-enter the Leased Premises
         and cure any Default of Tenant, and Tenant shall reimburse Landlord as
         Additional Rent for any costs and expenses which Landlord thereby
         incurs; and Landlord shall not be liable to Tenant for any loss or
         damage which Tenant may sustain by reason of Landlord's action.

(b)      Landlord may terminate this Lease or, without terminating this Lease,
         terminate Tenant's right to possession of the Leased Premises as of the
         date of such Default, and thereafter (i) neither Tenant nor any person
         claiming under or through Tenant shall be entitled to possession of the
         Leased Premises, and Tenant shall immediately surrender the Leased
         Premises to Landlord; and (ii) Landlord may re-enter the Leased
         Premises and dispossess Tenant and any other occupants of the Leased
         Premises by any lawful means and may remove their effects, without
         prejudice to any other remedy which Landlord may have. Upon the
         termination of this Lease, Landlord may declare the present value
         (discounted at the Prime Rate) of all rent which would have been due
         under this Lease for the balance of the Lease Term to be immediately
         due and payable, whereupon Tenant shall be obligated to pay the same to
         Landlord, together with all loss or damage which Landlord may sustain
         by reason of Tenant's Default ("Default Damages"), which shall include
         without

                                      -11-

<PAGE>

         limitation expenses of preparing the Leased Premises for re-letting,
         demolition, repairs, tenant finish improvements, brokers' commissions
         and attorneys' fees, it being expressly understood and agreed that the
         liabilities and remedies specified in this subsection (b) shall survive
         the termination of this Lease.

(c)      Landlord may, without terminating this Lease, re-enter the Leased
         Premises and re-let all or any part thereof for a term different from
         that which would otherwise have constituted the balance of the Lease
         Term and for rent and on terms and conditions different from those
         contained herein, whereupon Tenant shall be immediately obligated to
         pay to Landlord as liquidated damages the present value (discounted at
         the Prime Rate) of the difference between the rent provided for herein
         and that provided for in any lease covering a subsequent re-letting of
         the Leased Premises, for the period which would otherwise have
         constituted the balance of the Lease Term, together with all of
         Landlord's Default Damages.

(d)      Landlord may sue for injunctive relief or to recover damages for any
         loss resulting from the Default.

(e)      In addition to the defaults and remedies described above, the parties
         agree that if Tenant is in violation of the performance of any (but not
         necessarily the same) material term or condition of this Lease three
         (3) or more times during any twelve (12) month period, regardless of
         whether such violations are ultimately cured, then such conduct shall,
         at Landlord's option, represent a separate Default.

Section 13.03. Landlord's Default and Tenant's Remedies.

Landlord shall be in default if it fails to perform any term, condition,
covenant or obligation required under this Lease for a period of thirty (30)
days after written notice thereof from Tenant to Landlord; provided, however,
that if the term, condition, covenant or obligation to be performed by Landlord
is such that it cannot reasonably be performed within thirty days, such default
shall be deemed to have been cured if Landlord commences such performance within
said thirty-day period and thereafter diligently undertakes to complete the
same. Upon the occurrence of any such default, Tenant may sue for injunctive
relief or to recover damages for any loss directly resulting from the breach,
but Tenant shall not be entitled to terminate this Lease or withhold, offset or
abate any sums due hereunder.

Section 13.04. Limitation of Landlord's Liability.

If Landlord shall fail to perform any term, condition, covenant or obligation
required to be performed by it under this Lease and if Tenant shall, as a
consequence thereof, recover a money judgment against Landlord, Tenant agrees
that it shall look solely to Landlord's right, title and interest in and to the
Building for the collection of such judgment; and Tenant further agrees that no
other assets of Landlord shall be subject to levy, execution or other process
for the satisfaction of Tenant's judgment.

Section 13.05. Nonwaiver of Defaults.

Neither party's failure or delay in exercising any of its rights or remedies or
other provisions of this Lease shall constitute a waiver thereof or affect its
right thereafter to exercise or enforce such right or remedy or other provision.
No waiver of any default shall be deemed to be a waiver of any other default.
Landlord's receipt of less than the full rent due shall not be construed to be
other than a payment on account of rent then due, nor shall any statement on
Tenant's check or any letter accompanying Tenant's check be deemed an accord and
satisfaction. No act or omission by Landlord or its employees or agents during
the Lease Term shall be deemed an acceptance of a surrender of the Leased
Premises, and no agreement to accept such a surrender shall be valid unless in
writing and signed by Landlord.

Section 13.06. Attorneys' Fees.

If either party defaults in the performance or observance of any of the terms,
conditions, covenants or obligations contained in this Lease and the
non-defaulting party obtains a judgment

                                      -12-

<PAGE>

against the defaulting party, then the defaulting party agrees to reimburse the
non-defaulting party for reasonable attorneys' fees incurred in connection
therewith.

ARTICLE 14 - LANDLORD'S RIGHT TO RELOCATE TENANT

Landlord shall have the right upon at least thirty (30) days' prior written
notice to Tenant to relocate Tenant and to substitute for the Leased Premises
other space in the Building or in another building owned by Landlord, or an
affiliated entity of Landlord, in the vicinity containing at least as much
rentable area as the Leased Premises. Such substituted space shall be improved
by Landlord, at its expense, with improvements at least equal in quantity and
quality to those in the Leased Premises. Landlord shall reimburse Tenant for all
reasonable expenses incurred in connection with such relocation, including the
costs for printing of stationery and business cards with Tenant's new address.
In no event shall Landlord be liable to Tenant for any consequential damages as
a result of any such relocation, including, but not limited to, loss of business
income or opportunity.

ARTICLE 15 - TENANT'S RESPONSIBILITY REGARDING ENVIRONMENTAL LAWS AND HAZARDOUS
SUBSTANCES

Section 15.01. Environmental Definitions.

A.       "Environmental Laws" - All present or future federal, state and
         municipal laws, ordinances, rules and regulations applicable to the
         environmental and ecological condition of the Leased Premises, the
         rules and regulations of the Federal Environmental Protection Agency or
         any other federal, state or municipal agency or governmental board or
         entity having jurisdiction over the Leased Premises.

B.       "Hazardous Substances" - Those substances included within the
         definitions of "hazardous substances," "hazardous materials," "toxic
         substances" "solid waste" or "infectious waste" under Environmental
         Laws.

Section 15.02. Compliance.

Tenant, at its sole cost and expense, shall promptly comply with the
Environmental Laws including any notice from any source issued pursuant to the
Environmental Laws or issued by any insurance company which shall impose any
duty upon Tenant with respect to the use, occupancy, maintenance or alteration
of the Leased Premises whether such notice shall be served upon Landlord or
Tenant.

Section 15.03. Restrictions on Tenant.

Tenant shall operate its business and maintain the Leased Premises in compliance
with all Environmental Laws. Tenant shall not cause or permit the use,
generation, release, manufacture, refining, production, processing, storage or
disposal of any Hazardous Substances on, under or about the Leased Premises, or
the transportation to or from the Leased Premises of any Hazardous Substances,
except as necessary and appropriate for its Permitted Use in which case the use,
storage or disposal of such Hazardous Substances shall be performed in
compliance with the Environmental Laws and the highest standards prevailing in
the industry.

Section 15.04. Notices, Affidavits, Etc.

Tenant shall immediately notify Landlord of (i) any violation by Tenant, its
employees, agents, representatives, customers, invitees or contractors of the
Environmental Laws on, under or about the Leased Premises, or (ii) the presence
or suspected presence of any Hazardous Substances on, under or about the Leased
Premises and shall immediately deliver to Landlord any notice received by Tenant
relating to (i) and (ii) above from any source. Tenant shall execute affidavits,
representations and the like within five (5) days of Landlord's request therefor
concerning Tenant's best knowledge and belief regarding the presence of any
Hazardous Substances on, under or about the Leased Premises.

                                      -13-

<PAGE>

Section 15.05. Landlord's Rights.

Landlord and its agents shall have the right, but not the duty, upon advance
notice (except in the case of emergency when no notice shall be required) to
inspect the Leased Premises and conduct tests thereon to determine whether or
the extent to which there has been a violation of Environmental Laws by Tenant
or whether there are Hazardous Substances on, under or about the Leased
Premises. In exercising its rights herein, Landlord shall use reasonable efforts
to minimize interference with Tenant's business but such entry shall not
constitute an eviction of Tenant, in whole or in part, and Landlord shall not be
liable for any interference, loss, or damage to Tenant's property or business
caused thereby.

Section 15.06. Tenant's Indemnification.

Tenant shall indemnify Landlord and Landlord's managing agent from any and all
claims, losses, liabilities, costs, expenses and damages, including attorneys'
fees, costs of testing and remediation costs, incurred by Landlord in connection
with any breach by Tenant of its obligations under this Article 15. The
covenants and obligations under this Article 15 shall survive the expiration or
earlier termination of this Lease.

Section 15.07. Existing Conditions.

Notwithstanding anything contained in this Article 15 to the contrary, Tenant
shall not have any liability to Landlord under this Article 15 resulting from
any conditions existing, or events occurring, or any Hazardous Substances
existing or generated, at, in, on, under or in connection with the Leased
Premises prior to the Commencement Date of this Lease except to the extent
Tenant exacerbates the same.

ARTICLE 16 - MISCELLANEOUS

Section 16.01. Benefit of Landlord and Tenant.

This Lease shall inure to the benefit of and be binding upon Landlord and Tenant
and their respective successors and assigns.

Section 16.02. Governing Law.

This Lease shall be governed in accordance with the laws of the State where the
Building is located.

Section 16.03. Guaranty.

In consideration of Landlord's leasing the Leased Premises to Tenant, Tenant
shall provide Landlord with a Guaranty of Lease in the form attached hereto as
Exhibit D, executed by the Guarantor.

Section 16.04. Force Majeure.

Landlord and Tenant (except with respect to the payment of any monetary
obligation) shall be excused for the period of any delay in the performance of
any obligation hereunder when such delay is occasioned by causes beyond its
control, including but not limited to work stoppages, boycotts, slowdowns or
strikes; shortages of materials, equipment, labor or energy; unusual weather
conditions; or acts or omissions of governmental or political bodies.

Section 16.05. Examination of Lease.

Submission of this instrument for examination or signature to Tenant does not
constitute a reservation of or option for Lease, and it is not effective as a
Lease or otherwise until execution by and delivery to both Landlord and Tenant.

                                      -14-

<PAGE>

Section 16.06. Indemnification for Leasing Commissions.

The parties hereby represent and warrant that the only real estate brokers
involved in the negotiation and execution of this Lease are the Brokers. Each
party shall indemnify the other from any and all liability for the breach of
this representation and warranty on its part and shall pay any compensation to
any other broker or person who may be entitled thereto.

Section 16.07. Notices.

Any notice required or permitted to be given under this Lease or by law shall be
deemed to have been given if it is written and delivered in person or by
overnight courier or mailed by certified mail, postage prepaid, to the party who
is to receive such notice at the address specified in Article 1. If sent by
overnight courier, the notice shall be deemed to have been given one (1) day
after sending. If mailed, the notice shall be deemed to have been given on the
date which is three (3) business days following mailing. Either party may change
its address by giving written notice thereof to the other party.

Section 16.08. Partial Invalidity; Complete Agreement.

If any provision of this Lease shall be held to be invalid, void or
unenforceable, the remaining provisions shall remain in full force and effect.
This Lease represents the entire agreement between Landlord and Tenant covering
everything agreed upon or understood in this transaction. There are no oral
promises, conditions, representations, understandings, interpretations or terms
of any kind as conditions or inducements to the execution hereof or in effect
between the parties. No change or addition shall be made to this Lease except by
a written agreement executed by Landlord and Tenant.

Section 16.09. Financial Statements.

The financial statements of Guarantor are publicly available on the web site of
the Securities and Exchange Commission (www.sec.gov), as Guarantor, Zix
Corporation (NASDAQ: ZIXI), is a publicly-held entity and it is obligated to
file audited, quarterly financial statements with the SEC.

Section 16.10. Representations and Warranties.

The undersigned represent and warrant that (i) such party is duly organized,
validly existing and in good standing (if applicable) in accordance with the
laws of the state under which it was organized; and (ii) the individual
executing and delivering this Lease has been properly authorized to do so, and
such execution and delivery shall bind such party.

Section 16.11. Agency Disclosure.

Tenant acknowledges having previously received the Agency Disclosure Statement
attached. The broker as provided in Item I of the Basic Lease Provisions, its
agents and employees, have represented only Landlord, and have not in any way
represented Tenant, in the marketing, negotiation, and completion of this lease
transaction.

Section 16.12. Option to Terminate.

Provided Tenant is not in default hereunder, Tenant shall have the option to
terminate this Lease effective as of August 31, 2007. This option shall be
exercised by (i) Tenant's giving written notice to Landlord of its intention to
terminate on or before December 31, 2006, and (ii) Tenant's payment to Landlord
of an amount equal to the sum of four (4) months of the then current Monthly
Rental Installment and Annual Rental Adjustment, the unamortized Tenant
Improvements and the unamortized broker's commission, which payment shall
accompany the notice provided in (i) above. Such payment is made in
consideration for Landlord's grant of this option to terminate, to compensate
Landlord for rental and other concessions given to Tenant, and for other good
and valuable consideration. Such payment shall not in any manner affect Tenant's
obligations to pay Minimum Annual Rent and Annual Rental Adjustment or to
perform

                                      -15-

<PAGE>

its obligations under the Lease up to and including the date of termination.
Failure to timely and properly exercise this option shall forever waive and
extinguish it. If such option is validly exercised, then upon such termination,
Tenant shall surrender the Leased Premises to Landlord in accordance with the
terms of this Lease and each party shall be released from further liability
hereunder; provided, however, that such termination shall not affect any right
or obligation arising prior to termination or which survives termination of the
Lease.

         IN WITNESS WHEREOF, the parties hereto have executed this Lease as of
the day and year first above written.

                                      LANDLORD:

                                      DUKE REALTY OHIO,
                                      an Indiana general partnership

                                      By:   Duke Realty Limited Partnership,
                                            a general partner

                                            By:   Duke Realty Corporation,
                                                  its general partner

                                                   By:  /s/ Kevin T. Rogus
                                                       ------------------------
                                                          Kevin T. Rogus
                                                          Senior Vice President

                                      TENANT:

                                      POCKETSCRIPT, INC.,
                                      an Ohio corporation

                                      By:   /s/ Ronald A. Woessner
                                         ---------------------------------------

                                      Printed:  Ronald A. Woessner
                                              ----------------------------------

                                      Title:  V.P.
                                            ------------------------------------

                                      -16-

<PAGE>

STATE OF OHIO               )
                            ) SS:
COUNTY OF HAMILTON          )

         Before me, a Notary Public in and for said County and State, personally
appeared Kevin T. Rogus, by me known and by me known to be the Senior Vice
President of Duke Realty Corporation, an Indiana corporation, the general
partner of Duke Realty Limited Partnership, a general partner of Duke Realty
Ohio, an Indiana general partnership, who acknowledged the execution of the
foregoing "Lease" on behalf of said partnership.

         WITNESS my hand and Notarial Seal this 9 day of March, 2004.

                                      /s/ Naomi Gump
                                      -----------------------------------------
                                      Notary Public

                                      __________________________________________
                                      (Printed Signature)

My Commission Expires: _______________________

My County of Residence: ______________________

STATE OF Texas______________________)
                                    ) SS:

COUNTY OF Dallas ___________________)

         Before me, a Notary Public in and for said County and State, personally
appeared Ronald A. Woessner , by me known and by me known to be the Vice
President of PocketScript, Inc., an Ohio corporation, who acknowledged the
execution of the foregoing "Lease" on behalf of said corporation.

         WITNESS my hand and Notarial Seal this 1st day of March, 2004.

                                      /s/ Darleen Harris
                                      ----------------------------------
                                      Notary Public

                                      Darleen Harris
                                      ----------------------------------
                                      (Printed Signature)

My Commission Expires: 5-15-05

My County of Residence: Collin

                                      -17-

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