This issue occurs after an Agent has been pushed to a specified managed agent machine. The alert level is a warning and can be seen after selecting the Administrator view ribbon and double clicking on the Agent Managed folder just under Device Management.
Possible causes include:
An older existing account from a previous install of SCOM 2007 R2 was chosen by SCOM during the Agent deployment process.
The assigned run as account does not have the necessary permissions across the domain to be used as a universal run as account.
The account is so new, it has populated across the domain forest.
A trust relationship has not been created across sub domains across the domain forest.
Do one or more of the following:
1. Uninstall the agents with this error.
2. If the account is correct and relatively new, wait for ten minutes and install the agent again.
3. If the issue still persists, uninstall the agent and acquire the password needed to log into the target machine. Use the Remote Desktop Connection program in the Accessories folder of your local to log into it.
Any issues dealing with logging into the machine will prove trust relation issues.