We're having random issues with one server generating an alarm with message "Permission denied - Verify WMI Credential". Generally, the problem is cleared on the next poll but this happens several times per day. If I manually test the connection, it passes every time.
The server in question is W2k8. Also, the Op Manager server is located in the US and the server being checked is in Australia. We have other servers in that site being monitored that have never had this issue - just the one.