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Event ID: 21185 Source: MicrosoftOperationsManager

Level
Description
Computer discovery found that the following computer rules (which are "Equals" type "Include" rules) did not match any computers during the computer discovery scan.
These discovery rules may have been specified in the Administration UI or in the ManualMC.txt file. The computer name may be misspelled or the computer or its domain may not be contactable.
<computer1> <computer2> ... <computerN>.
Comments
 
See ME913812 to download a file from Microsoft that will resolve this issue.
The chapter "Discovering Computers and Deploying MOM Agents" from the MOM 2005 Deployment Guide, provides information on the process of discovering computers and deploying MOM agents to manage those computers.
"Using the ManualMC.txt Text File" provides information on the ManualMC.txt file.

This event can be related to EventID 21078 from source Microsoft Operations Manager.

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