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                                                                    EXHIBIT 10.3

                    SEVERANCE AGREEMENT AND GENERAL RELEASE

          NaviSite, Inc. ("NaviSite" or the "Company") and Barbara Fortier, (the
"Employee") agree as of November 8, 1999 that the following sets out their
understanding regarding the Employee's separation from the Company.

                                   RECITALS

          Whereas the parties to this Agreement wish to set out the terms and
conditions under which the Employee will sever her employment relationship with
NaviSite;

          For purposes of this Agreement, whenever the name Company is used, it
includes all parent, subsidiary, and affiliated entities, including but not
limited to NaviNet, Engage Technologies and CMG Information Services, Inc.
("CMGI"), as well as all current and former agents, employees, attorneys,
insurers, shareholders, officers and directors, all successors and assigns and
all other persons and entities for whose acts and omissions the Company may be
held liable.

          In consideration of the promises and conditions set forth below, the
sufficiency of which is hereby acknowledged, the Company and the Employee agree
as follows:

1.        TERMINATION DATE - The Employee's effective date of termination from
          ----------------
the Company shall be November 30, 1999 (the "Termination Date").

2.        SEVERANCE PAY - To receive the stated severance benefits you must sign
          -------------
this Agreement and return it to NaviSite no sooner than your Termination Date
and no later than 21 calendar days after your termination date.  Within 15 days
after the receipt by NaviSite of the executed Agreement, the Company will pay
the Employee A LUMP SUM PAYMENT equivalent to sixteen (16) weeks of her current
base salary less applicable state and federal taxes.

3.        BENEFITS - Effective as of the Termination Date, you shall be
          --------
considered to have elected to continue receiving group medical insurance
pursuant to the federal "COBRA" law, 29 U.S.C. (S)1161 et seq.  For the first
                                                       ------
two months after the termination date, the Company shall pay the full premium
for such coverage. All premium costs after the two month period shall be paid by
you on a monthly basis for as long as, and to the extent that, you remain
eligible for COBRA continuation. All other benefits, including life insurance
and longterm disability, will cease upon the termination date.

4.        STOCK OPTIONS - The Company will request on Employee's behalf that
          -------------
BancBoston Robertson Stephens Inc., on behalf of itself and as the
representatives for the underwriters, releases Employee from the Lock-Up
Agreement she executed on August 13, 1999. Employee will then have the right to
exercise all vested options that she has in CMGI, NaviSite, and NaviNet in
accordance with the applicable plans and agreements.

5.        OUTPLACEMENT - NaviSite agrees to provide you executive outplacement
          ------------
services with a provider to be identified. The value of these services shall not
exceed a cost of $10,000.

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6.        VACATION PAY - The Employee will receive payment on the Termination
          ------------
Date for any unused vacation time accrued through the Termination Date.

7.        RELEASE - For the purpose of implementing a full and complete
          -------
settlement and release and in consideration of the above payments and benefits,
to which the Employee acknowledges that she would not otherwise be entitled, the
Employee hereby fully, forever, irrevocably and unconditionally releases,
remises and discharges the Company, its officers, directors, stockholders,
agents, employees, corporate affiliates and attorneys, from any and all claims,
charges, complaints, demands, actions, causes of action, suits, rights, debts,
sums of money, costs, accounts, reckonings, covenants, contracts, agreements,
promises, doings, omissions, damages, executions, obligations, liabilities, and
expenses (including attorneys' fees and costs), of every kind and nature which
she ever had or now has against the Company, its officers, directors,
stockholders, corporate affiliates, agents, employees and attorneys, including,
but not limited to, all claims arising out of her employment, all employment
discrimination claims under any state, federal, or local law, including but not
limited to, Title VII of the Civil Rights Act of 1964, 42 U.S.C. (S)2000 et
                                                                         --
seq.; the Age Discrimination in Employment Act, 29 U.S.C. (S)621 et seq.; the
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Americans With Disabilities Act, 42 U.S.C., (S)12101 et seq.; the
Massachusetts Fair Employment Practices Act, M.G.L. c. 151B (S)1 et seq.; the
                                                                 ------
Massachusetts Civil Rights Act, M.G.L. c. 12 (S)(S)11H and 11I, the
Massachusetts Equal Rights Act, c. 93 (S)102 and M.G.L. c. 214, (S)1C, as well
as any common law tort claims, wrongful discharge claims, and all other claims
brought under any other federal, state or local statutes or ordinances not
expressly referenced above.

8.        NON-DISCLOSURE AND NON-COMPETITION - The Employee acknowledges her
          ----------------------------------
obligation to keep confidential all non-public information concerning the
Company which Employee has acquired during the course of employment with the
Company. As stated more fully in the CMG Information Services, Inc.,
Nondisclosure and Developments Agreement, including all attachments thereto,
signed by Employee on July 3, 1997 (which remain in full force and effect), the
Employee will not disclose any such information to, or use such information for
the benefit of, any third party, including competitors of the Company. The
Employee further acknowledges and reaffirms her obligations under the non-
competition agreement previously signed by Employee. The Employee further
acknowledges that the obligations pursuant to the non-competition agreement will
remain in full force and effect.

9.        COMPANY EQUIPMENT - The Employee confirms that she has returned to the
          -----------------
Company all files, records, equipment and any other Company-owned property in
her possession, including, without limitation, all equipment, tangible
proprietary information, documents, books, records, reports, contracts, lists,
computer disks (or other computer-generated files or data), or copies thereof,
created on any medium, prepared or obtained by the Employee in the course of or
incident to her employment with the Company.

10.       AMENDMENTS; WAIVERS - This Agreement may not be amended except by an
          -------------------
instrument in writing, signed by each of the parties. No failure to exercise and
no delay in exercising any right, remedy, or power under this Agreement shall
operate as a waiver thereof, nor shall any single or partial exercise thereof,
or the exercise of any other right, remedy, or power provided herein or by law
or in equity.

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11.       SEVERABILITY - Should any provision of this Agreement be declared or
          ------------
be determined by any court of competent jurisdiction to be illegal or invalid,
the validity of the remaining parts, terms or provisions shall not be affected
thereby and said illegal and invalid part, term or provision shall be deemed not
to be a part of this Agreement.

12.       CONFIDENTIALITY - The Employee understands and agrees that the
          ---------------
existence and terms of this Agreement and release are confidential and shall not
be disclosed to any third party without the written consent of the Company,
except as required by federal or state law.

13.       NATURE OF AGREEMENT - The parties understand and agree that this
          -------------------
Agreement is a severance agreement and does not constitute an admission of
liability or wrong doing on the part of the Company.

14.       AGE DISCRIMINATION CLAIMS - The Employee understands and agrees that,
          -------------------------
by entering this Agreement, (a) she is waiving any rights or claims she might
have under the Age Discrimination in Employment Act, as amended by the Older
Workers Benefit Protection Act; (b) she has received consideration beyond that
to which she was previously entitled; (c) she is advised to consult with an
attorney before signing this Agreement; and (d) she has been offered the
opportunity to evaluate the terms of this Agreement for not less than twenty-one
(21) days prior to her execution of the Agreement. The Employee understands that
she may revoke this Agreement (by written notice to the Company) for a period of
seven (7) days after the execution of this Agreement, and the Agreement shall
not be effective or enforceable until the expiration of this seven (7) day
revocation period.

15.       VOLUNTARY ASSENT - The Employee affirms that no other promises or
          ----------------
agreements of any kind have been made to or with her by any person or entity
whatsoever to cause the Employee to sign this Agreement, and that she fully
understands the meaning and intent of this Agreement. The Employee further
states and represents that she has carefully read this Agreement, understands
the contents herein, freely and voluntarily assents to all of the terms and
conditions hereof, and signs her name of her own free act.

16.       NON-DISPARAGEMENT - The Employee understands and agrees that she shall
          -----------------
not make any false, disparaging or derogatory statements in public or private
regarding the Company or any of its directors, officers, employees, agents or
representatives or the Company's business affairs and financial condition.

17.       APPLICABLE LAW - This Agreement shall be interpreted and construed by
          --------------
the laws of the Commonwealth of Massachusetts, without regard to conflicts of
laws provisions. The Employee hereby irrevocably submits to, and acknowledges
and recognizes the jurisdiction of the courts of the Commonwealth of
Massachusetts (which courts, together with all applicable appellate courts, for
purposes of this Agreement, are the only courts of competent jurisdiction) over
any suit, action or other proceeding arising out of, under or in connection with
this Agreement or the subject matter hereof.

18.       ENTIRE AGREEMENT - The parties understand and agree that the preceding
          ----------------
paragraphs recite the sole consideration for this Agreement, and that all
agreements and understandings between the Employee and the Company on any
subject are embodied and expressed in this Agreement. This Agreement shall
supersede all prior or contemporaneous agreements and

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understandings between the Employee and the Company, whether written or oral,
express or implied, with respect to any subject whatsoever, except to the extent
that the provisions of any such agreement have been expressly referred to in
this Agreement as having continued effect.

       IN WITNESS WHEREOF, all parties have set their hand and seal to this
Agreement as of the date written above.

NaviSite, Inc.
By its authorized representative,

Name:   /s/ Jeanne Knight
      -------------------------------

Title:  Director, Human Resources
      -------------------------------

Date:   11/9/99
      -------------------------------

BARBARA FORTIER

         /s/ Barbara Fortier
      -------------------------------

Date:   12/2/99
      -------------------------------

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[NaviSite LOGO APPEARS HERE]

             AMENDMENT TO SEVERANCE AGREEMENT AND GENERAL RELEASE

        In accordance with the Company's letter to the Employee dated November
19, 1999, and pursuant to paragraph 17 of the Severance Agreement and General
Release (the "Agreement") between the parties dated November 8, 1999, paragraph
1 of the Agreement is hereby amended to read:

        "TERMINATION DATE - The Employee's effective date of termination from
         ----------------
        the Company shall be December 10, 1999."

NaviSite, Inc.
By its authorized representative,

Name:   /s/ Jeanne Knight
        ---------------------------

Title:  Director, Human Resources
        ---------------------------

Date:   12/2/99
        ---------------------------

BARBARA FORTIER

        /s/ Barbara Fortier
        ---------------------------

Date:   12/2/99
        ---------------------------

100 Brickstone Square
5th Floor
Anodover, MA 01810

p 888.298.8222
f 978.684.3599

www.navisite.com<PAGE>

                                                                EXHIBIT 10.17(b)

                              FIRST AMENDMENT TO

                             SHAREHOLDER AGREEMENT

          This FIRST AMENDMENT to the SHAREHOLDER AGREEMENT dated as of November
1, 1999 (the "First Amendment") is made by and among Vail Resorts, Inc., a
Delaware corporation ("Vail"), Ralcorp Holdings, Inc., a Missouri corporation
(f/k/a Ralston Foods, Inc., a Nevada corporation) ("Foods"), and Apollo Ski
Partners, L.P., a Delaware limited partnership ("Apollo"), amending certain
provisions of the Shareholder Agreement dated as of January 3, 1997 (the
"Shareholder Agreement"), by and among Vail, Foods and Apollo.  Terms used but
not otherwise defined herein shall have the respective meanings ascribed thereto
in the Shareholder Agreement.

          WHEREAS, the Shareholder Agreement contains a covenant pursuant to
which Foods has agreed to vote each class of Vail Equity owned by Foods and its
Affiliates in the manner set forth in the Shareholder Agreement;

          WHEEREAS, Vail, Foods and Apollo have agreed to modify the voting
provisions of the Shareholder Agreement as specifically set forth in this First
Amendment.

          NOW, THEREFORE, in consideration of the premises and mutual agreements
contained herein and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

                                   ARTICLE I

                    AMENDMENTS TO THE SHAREHOLDER AGREEEMENT

1.1.  Section 2.3 of the Shareholder Agreement is revised in its entirety to
read as follows:

     "Section 2.3 Voting of Vail Equity.  Foods agrees that during the term of
                  ---------------------
     this Agreement, with respect to the election of directors of Vail, each
     class of Vail Equity owned by Foods and its Affiliates shall be voted (i)
     "for" the nominees recommended by the Board of Directors of Vail, provided
     Vail and Apollo are in compliance with the terms of Section 11.2 of this
     Agreement, (ii) in accordance with the recommendation of the Board of
     Directors of Vail on each proposal of a security holder pursuant to Rule
     14a-8 under the Exchange Act, so long as the subject matter of such
     proposal does not fall, within the second proviso hereto, and (iii) with
     respect to all other matters requiring a vote of the Vail Equity, "for" any
     proposal in the same proportion as the votes cast "for" any proposal in the
     same proportion as the votes cast "for" such proposal by the holders of the
     Vail Securities of the same class (excluding the Vail Equity owned by
     Foods), and "against" any proposal in the same proportion as the votes cast
     "against" such proposal in the same proportion as the votes cast "against"
     such proposal by the holders of each such class of Vail Securities
     (excluding the Vail Equity owned by Foods) and that with respect to broker
     non-votes and abstentions, each class of Vail Equity owned by Foods will be
     voted in the same proportion as votes deemed "for," "against" or "abstain,"
     giving effect to broker non-votes and abstentions as required under the
     laws and rules then applicable; provided, however, that Foods shall retain
                                     --------  -------
     the right to vote all of its Vail Equity in favor of the approval of the
     Vail Resorts, Inc. 1999 Long Term Incentive and Share Award Plan as adopted
     and approved by the Board of Directors of Vail and submitted to a vote of
     the shareholders generally; provided, further, that Foods shall retain the
                                 --------  -------
     right to vote its Vail Equity in any manner it sees fit with respect to any
     proposals for (1) the merger, consolidation or other business combination
     of Vail or any subsidiary of Vail with or into any other corporation, (2)
     the sale, lease, exchange, transfer or other disposition of all or
     substantially all of the assets of Vail and all of its subsidiaries taken
     together as a single business, (3) the creation of any other class of stock
     with voting rights, (4) changes to the Certificate of Incorporation or
     Bylaws of Vail that adversely affect Foods' rights under this Agreement.
     The

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     provisions of this Section 2.3 shall apply to both the casting of votes at
     meetings of shareholders and execution of actions by written consent."

                                   ARTICLE II

                       PROVISIONS OF GENERAL APPLICATION

2.1.  Except as otherwise expressly provided by this First Amendment, all of the
terms, conditions and provisions to the Shareholder Agreement remain unaltered.
The Shareholder Agreement and this First Amendment shall be read and construed
as one agreement.

2.2.  If any of the terms of this First Amendment shall conflict in any respect
with any of the terms of the Shareholder Agreement, the terms of this First
Amendment shall be controlling.

          IN WITNESS WHEREOF, the parties hereto have caused this First
Amendment to be executed by their duly authorized officers, all as of the day
and year first above written.

                              VAIL RESORTS, INC.

                              By: /s/  Martha D. Rehm
                                  ---------------------------
                                Name:  Martha D. Rehm
                                Title: Senior Vice President

                              RALCORP HOLDINGS, INC.

                              By: /s/  Joe R. Micheletto
                                 -------------------------------
                                Name:  Joe R. Micheletto
                                Title: Chief Executive Officer
                                       and President

                              APOLLO SKI PARTNERS, L.P.

                              By:  Apollo Investment Fund, L.P.

                              By:  Apollo Advisors, L.P.

                              By:  Apollo Capital Management, Inc.

                              By:  /s/ Robert Katz
                                 -------------------------------
                                 Name:  Robert Katz
                                 Authorized Signatory

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