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                                                                   EXHIBIT 10.58

                              AMENDMENT #2 TO LEASE

1.       Parties.

         This Amendment, dated as of December 1, 2003, is between 400 River
Limited Partnership ("Landlord") and NaviSite, Inc., ("Tenant").

2.       Recitals.

         2.1.     Landlord and Tenant have entered into a Lease, dated as of
5/14/1999, for premises known as 400 Minuteman Road in Andover, Massachusetts,
and Amendment #1 to Lease, dated as of June 26, 2003 (this Lease, as now or
hereafter amended or extended, is called the "Lease"). Unless otherwise defined,
terms used in this Amendment have the same meanings as those used in the Lease.

         2.2      The parties wish to amend the Lease to change certain of the
definitions and the rent payments by Tenant thereunder. To accomplish this and
other matters, for good and valuable consideration, the receipt and sufficiency
of which are acknowledged, the parties agree and the Lease is amended as follows
as of the date hereof, notwithstanding anything to the contrary:

3.       Amendments.

         3.1      Section 3.6 of Amendment #1 to Lease is deleted and replaced
by the following:

                  "3.6     In Section 7.1 of the Lease, the definition of
         Operating Costs will be amended as follows: the word "Premises" will be
         replaced by the word "Project" as defined in this Amendment; costs and
         expenses incurred in connection with the Common Area will be included
         therein; and starting on December 1, 2003, the management fee (or fee
         in lieu thereof) will be three percent (3%) of all scheduled rent
         payable by Tenant and any other tenants or licensees of the Project
         (including, without limitation, the WSI Tenant), subject to the
         inclusions and exclusions described in Section 7.1.

         The definition of Operating Costs payable under the WSI Lease (which
         includes Landlord's insurance costs) may differ in some respects from
         the definition of Operating Costs under the Lease (as defined above),
         and so it's possible that the Operating Costs and insurance costs
         payable under the WSI Lease may be less than what Landlord would have
         received if Tenant had continued to lease the WSI Space. To prevent
         Landlord from being penalized, starting on December 1, 2003 and for the
         remainder of the Lease term, Tenant will pay to Landlord any shortfall
         that Landlord may incur if the share of Operating Costs and Landlord's
         insurance costs payable under the WSI Lease is less than it would have
         been if the definitions of Operating Costs and Landlord's insurance
         costs payable under the WSI Lease were the same as Tenant's under the
         Lease. This shortfall (if any) will be paid by Tenant as additional
         rent each month (or less frequently as may be billed by Landlord) and
         in addition to any other amounts payable by Tenant under the Lease."

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         3.2      A default by the Borrower under that certain $2,200,000
Promissory Note, dated as of December 1, 2003, made by Borrower in favor of U.S.
Managers Realty, Inc. will be deemed to be a default under the Lease.

         3.3      Exhibit D-1 to Amendment #1 to Lease is deleted and replaced
by Exhibit D-2 attached hereto and incorporated herein by this reference.

4.       No Other Changes.

         The Lease is in full force and effect, and except as set forth above
the Lease remains unchanged.

         IN WITNESS WHEREOF, intending to be legally bound, the parties have
executed this Amendment under seal as of the date first set forth above.

NAVISITE, INC., A DELAWARE CORPORATION    400 RIVER LIMITED PARTNERSHIP, A
                                          MASSACHUSETTS LIMITED PARTNERSHIP

By: /s/ Arthur P. Becker
        ---------------------------
    Name: Arthur P. Becker                By: Niuna-400 River, Inc., a
    Title: Chief Executive Officer            Massachusetts corporation, general
    Authorized Signature                      partner
    Date: December 23, 2003
                                              By: /s/ John Kusmiersky
                                                      --------------------------
                                                      Name: John Kusmiersky
                                                      Title: President
                                                      Authorized Signature
                                                      Date: December 29, 2003

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                                   EXHIBIT D-2

                                    BASE RENT

1. Starting on December 1, 2003, and in addition to the amounts described below
and any other amounts payable by Tenant as described in this Amendment or the
rest of the Lease (e.g., the amounts payable under Section 3.1 of this
Amendment), during the remaining Lease term Tenant only will pay base rent at
the rates set forth in the Lease for the Remaining Premises (86,931 s.f. of
rentable area), and Tenant's Percentage of Taxes, Operating Costs and Landlord's
insurance costs will be reduced to 56.82%; provided, however, that during the
term of any Extension Option under the Lease, the base rent otherwise payable by
Tenant during that term under the Lease will be increased by Sixty Cents ($0.60)
per square foot of agreed rentable area in the Remaining Premises.

2. Starting on December 1, 2003, and in addition to the base rent described
above and any other amounts payable by Tenant as described in this Amendment or
the rest of the Lease, during the remaining Lease term Tenant will pay to
Landlord as additional base rent under the Lease: (a) the scheduled annual base
rent per square foot under the Lease multiplied by the agreed rentable area of
the WSI Space; less (b) the scheduled annual base rent per square foot under the
WSI Lease multiplied by the agreed rentable area of the WSI Space. This
additional base rent will be paid monthly in advance in the same manner as the
rest of the base rent. As a purely hypothetical example, if the WSI Space
contains 66,069 s.f. and the annual base rent per square foot under the WSI
Lease is $10.00, on December 1, 2003 Tenant would pay $24,500.59 in additional
base rent for the month of December, 2003 (i.e., [66,069 s.f. x $14.45/12] -
[66,069 s.f. x $10.00/12] = $24,500.59).

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                                                                   EXHIBIT 10.59

                           NEGOTIABLE PROMISSORY NOTE

$2,200,000                  December 1, 2003              Andover, Massachusetts

         1.       For value received, NAVISITE, INC., a Delaware corporation
("Borrower"), promises to pay to the order of U.S. MANAGERS REALTY, INC., a
California corporation ("Lender"), at 2101 Rosecrans Avenue, Suite 5252, El
Segundo, California 90245, or at such other place as may be designated in
writing by Lender, the principal sum of TWO MILLION TWO HUNDRED THOUSAND DOLLARS
($2,200,000), together with interest thereon at the rate of ELEVEN PERCENT (11%)
PER ANNUM, and such other charges as may be due in connection with this Note as
described below.

         2.       Borrower is the Tenant under a Lease, dated as of 5/14/1999
(as amended, the "Lease"), of space in the building located at 400 Minuteman
Road, Andover, MA 01810 (the "Building"). Borrower has elected to have the
Landlord under the Lease ("Landlord") construct improvements for a new tenant,
WSI Corporation, that now leases space on the second floor of the Building
formerly leased and occupied by Borrower. At Borrower's request, from time to
time Lender has advanced funds for this purpose to Landlord on Borrower's behalf
before this date, and may advance funds hereafter. Notwithstanding anything to
the contrary, the parties agree that: a default by Borrower under this Note
automatically will be deemed to be a default by the Tenant under the Lease (and
Landlord is hereby made a third party beneficiary for these purposes), and a
default by the Tenant under the Lease automatically will be deemed to be a
default by Borrower under this Note, and in either case Lender and Landlord each
will have the right to exercise any or all of their available rights and
remedies hereunder and under the Lease, respectively, all of which are
cumulative and not exclusive. If Borrower defaults or is deemed to have
defaulted hereunder, among its other rights Lender will have the right, but not
the obligation, to accelerate all unpaid installments of principal and interest
hereunder. Notwithstanding anything to the contrary herein, Borrower shall be
permitted a grace period of seven (7) days after notice from Lender to satisfy
any payments due or payable hereunder.

3.       Principal and interest under this Note will be paid by Borrower in
equal monthly installments of Seventy-two Thousand Twenty-five Dollars and
Eighteen Cents ($72,025.18) each starting on December 1, 2003 and on the first
day of each successive month thereafter for the next thirty-five (35) months
through and including November 1, 2006. All amounts paid by Borrower first will
be credited to charges other than interest or principal due under this Note,
then to interest due and then to principal. All amounts due will be paid in U.S.
dollars and in immediately available funds, and amounts not paid when due will
bear interest at the rate of eleven percent (11%) per annum from the date due
until paid in full. Borrower will have the right to partially or fully prepay
this Note at any time.

         4.       If for any reason any amounts due under this Note are deemed
to be usurious or unlawful, then those amounts due shall be deemed reduced to
the legal maximum and additional amounts collected shall be deemed to have been
applied to principal or, if such application is unlawful, shall be credited
against amounts next due from Borrower or be refunded to Borrower.

         5.       BORROWER IRREVOCABLY WAIVES ALL RIGHT TO A TRIAL BY JURY IN
ANY PROCEEDING INSTITUTED BY OR AGAINST BORROWER RELATING TO THIS NOTE. Borrower
irrevocably waives: presentment; protest; demand and all defenses,
counterclaims, offsets, credits or other defenses to this Note or payment
hereunder; notice of dishonor; notice of default or delinquency; notice of
acceleration; notice of protest and nonpayment; diligence in taking any action
to collect any sums owing under this Note; and all other notices or demands in
connection with the delivery, acceptance, performance, default or enforcement of
this Note. This Note and Borrower's obligations hereunder are and will continue
to be absolute, unconditional, valid and enforceable by Lender regardless of any
agreements or circumstances of any nature under the Lease (including, without
limitation, actual or alleged claims against or defaults by Landlord under the
Lease).

         6.       Time is of the essence. This Note shall be construed and
enforced in accordance with the local, internal laws of the Commonwealth of
Massachusetts applicable to agreements entered into and to be performed wholly
therein. The parties consent and submit to the sole and exclusive jurisdiction
and venue of any Federal or State Court in Boston, Massachusetts, and agree not
to contest such jurisdiction and venue.

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Borrower will pay to Lender all reasonable costs and expenses, including,
without limitation, reasonable attorneys' fees and costs and costs of discovery,
incurred by Lender in any suit, action, or proceeding to collect sums owed or
enforce or interpret Lender's rights under or in connection with this Note. This
Note is an integrated agreement. This Note is binding on Borrower and its
successors and assigns and inures to the benefit of Lender, Landlord under the
Lease (for the purposes stated herein), and their respective successors and
assigns. If any portion of this Note is held to be invalid or unenforceable, the
other provisions of this Note will remain in full force and effect. All waivers
must be in writing, specify the act or omission waived and be signed by the
party charged with the waiver. This Note may not be amended except by written
agreement signed by Borrower and Lender.

         IN WITNESS WHEREOF, Borrower, intending to be legally bound, has
executed this Note under seal as of the date first set forth above.

NAVISITE, INC.

By: /s/ Arthur P. Becker
    -------------------------------------
        Name: Arthur P. Becker
        Title: Chief Executive Officer
        Authorized Signature
        Date: December 23, 2003

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