Hello,
Is this a new machine with a New SEPM installation?
Did the machine ever had earlier version of SEPM installed on it?
Upon checking the Logs, we see the scm-server-0.log and found as following:
com.sygate.scm.server.agentmanager.InvalidDomainIdRegistrationException: UT7 The client is trying to register with an invalid domain ID 7B658099C0A8C8D60024B94374D8B180.
at com.sygate.scm.server.agentmanager.AgentRequestHandler.registerClient (AgentRequestHandler.java: 1698)
Cause: SEP clients were trying to register to the SEPM with an invalid Domain ID.
Solution: Replace the sylink.xml file on all clients that were trying to register with an invalid Domain ID.
Check this Article:
SEP 12.1 RU2 and Reset Client Communication
https://www-secure.symantec.com/connect/articles/sep-121-ru2-and-reset-client-communication
How do I replace the client-server communications file on the client computer?
http://www.symantec.com/docs/HOWTO81116
Hope that helps!!