Support will guide you through what might be needed from the client machine if you speak to them.
you can use "mer.exe". Run it on your computer. Select criteria that you want. You can collect all the logs abouth your machine.
To make a diagnosis do the following from the client machine:
A.- Ping the ePO server to see if it replies.
B.- trace the ePO server to verify routing.
C.- Validate trough telnet that your client/server ports respond on the ePO server, and from the server to see if the client responds.
the agent log is the one called "agent_MACHINENETBIOSNAME.log"
the agent update log is called "UPDATERUI_MACHINENETBIOSNAME.LOG"
Depending on your OS, the location is different, most commonly inside the documents and settings user folder, inside either program data or local data.
I Hope it helps,
If you couldn't find anything on log, one of the solution is uninstall epo and mcafee agent on your system and then install again. i can solve many problem with uninstall..
With respect to the MER tool mentioned please read support article:
KB59385 - How to use MER tools with supported McAfee products