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Event ID: 21170 Source: OnePointOperations

The Agent Manager experienced an error attempting to contact computer <computer> while resolving the Managed Computer rules. The service account may lack necessary privileges, the computer may be offline, or the computer may be running something other than Windows NT or Windows 2000.
As per Microsoft: "Network problems that prevent communication are often the reason why computers cannot be accessed. This is true especially when computers are added to the list of managed computers manually, instead of relying on pattern matching. Using pattern matching and wildcards only includes computers that exist in the domain browse list. These computers are probably on the network and running. If a computer name has been entered manually, the Agent Manager will continue attempting to contact it, regardless of whether it exists or not". See "Microsoft Operations Manager 2000 Chapter 8 - MOM Agent Management" for more details on this issue.

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