Microsoft KB Archive/216357

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Identifying Group Policy Client-Side Extensions

Article ID: 216357

Article Last Modified on 2/22/2007


  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows 2000 Datacenter Server

This article was previously published under Q216357


Group Policy architecture includes both server and client-side components. The server component includes the user interface that an administrator can use to configure a unique policy. When Group Policy is applied to a user or computer, the client component interprets the policy and makes the appropriate changes to the environment. These are known as Group Policy client-side extensions. A Globally Unique Identifier (GUID), a 128-bit number identifying a given object, identifies the extension to the operating system. As Group Policy is processed, the Winlogon process passes the list of Group Policy Objects (GPOs) that must be processed to each Group Policy client-side extension. The extension uses the list to process the appropriate policy when applicable.

When viewing event log entries and log files recorded by Group Policy and these client-side extensions, an administrator may need to identify the extension by its GUID.


Because the GUID for each client-side extension was assigned when the component was created, the GUIDs for each of the client-side extensions documented below are the same on each installation of Windows 2000.

  • GUID: 25537BA6-77A8-11D2-9B6C-0000F8080861

Component: Folder Redirection

  • GUID: 3610EDA5-77EF-11D2-8DC5-00C04FA31A66

Component: Microsoft Disk Quota

  • GUID: 42B5FAAE-6536-11D2-AE5A-0000F87571E3

Component: Scripts

  • GUID: 827D319E-6EAC-11D2-A4EA-00C04F79F83A

Component: Security

  • GUID: B1BE8D72-6EAC-11D2-A4EA-00C04F79F83A

Component: EFS Recovery

  • GUID: C6DC5466-785A-11D2-84D0-00C04FB169F7

Component: Application Management

  • GUID: A2E30F80-D7DE-11d2-BBDE-00C04F86AE3B

Component: Internet Explorer Settings

  • GUID: 35378EAC-683F-11D2-A89A-00C04FBBCFA2

Component: Registry Settings

  • GUID: e437bc1c-aa7d-11d2-a382-00c04f991e27

Component: IP Security

Third-party programs and additional Microsoft services that install client-side extensions register those components in the following registry location:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\GPExtensions

For additional information about the GPExtensions registry entry, see the following article in the Microsoft Knowledge Base:

216358 Troubleshooting Group Policy Client-Side Extension Behavior

Keywords: kbenv kbinfo KB216357