Q. Can I install ISA Server 2004 on a computer running Microsoft Windows® 2000 Server?
A.
Yes. Note the following:
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Windows 2000 Service Pack 4 (SP4) or later must be installed.
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Internet Explorer 6 or later must be installed.
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All critical updates should be installed.
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If you are using the Windows 2000 SP4 slipstream, you must also install the hotfix specified in the Microsoft Knowledge Base article 821887, "Events for Authorization Roles Are Not Logged in the Security Log When You Configure Auditing for Windows 2000 Authorization Manager Runtime."
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If you install on Windows 2000, you cannot configure the L2TP IPSec preshared key.
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Quarantine mode for VPN clients is not supported.
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On servers running Windows 2000, all ISA Server services run using the local system account. (These run under the Network Service account on computers running Windows Server„¢ 2003.)