Assume that the Windows Time service (W32Time) on a Microsoft Windows Server 2003-based or Microsoft Windows 2000-based computer is set to run behind a proxy server, such as Microsoft Internet Security and Acceleration (ISA) Server 2004, Microsoft ISA Server 2000, Microsoft Proxy Server 2.0, or Microsoft Proxy Server 1.0. In this scenario, the Time service may not be able to connect to the external Network Time Protocol (NTP) Time service.
This issue occurs because the Windows Time service runs
under the local system account on the internal server, and the Access Control
feature is enabled on the proxy server.
To work around this issue, use any of the following
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the Windows 2000 Time
service, click the following article number to view the article in the Microsoft Knowledge Base:
How to configure an authoritative time server in Windows 2000
You can also view the "Windows Time Service" white paper at
the following Microsoft Web site: