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Event ID: 25401 Source: MicrosoftOperationsManager

The Microsoft Operations Manager WMI provider could not connect to WMI Namespace <namespace>. Ensure that the specified WMI Namespace exists on the computer.
From a newsgroup post: "Download WMI Administrative Tools, run WMI CIM Studio, and connect to the computer with the problem. This will show you if you actually have the named namespace installed".

As per ME296005, this event appears if an invalid rule is created and enabled in MOM.

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