The Windows Management Instrumentation (WMI) filtering is an addition to the Group Policy infrastructure of Windows Server 2003. It is designed to enable the administrator to specify a WMI-based query to filter the affect of a Group Policy Object. This is an addition to the GPO Properties page as a new tab. A filter can be specified, created, and edited. Support is also included to allow RSoP to display existing WMI filters. Conceptually, this is similar to how Windows 2000 handled the Security group filtering. The advantage of this feature is to allow an administrator to dynamically determine whether to apply a GPO based on any properties available via WMI especially for exception management. This function is available by invoking Group Policy Properties page WMI Filter tab.
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