Hi,
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SesmLu.log will contain information about SEPM liveupdate.
The SesmLu.log contains data that is recorded when LiveUpdate runs on the SEPM for any reason.This side of the logging is for what happens internally after the content has been downloaded.
File location: C:\Program Files\Symantec\Symantec Endpoint Protection Manager\Tomcat\Logs\SesmLu.log
Typically searching for the phrase “Failed to notify” or “error” will lead you to the best results.
For the trobleshooting between SEPM and SEP client you can refer log.liveupdate.
Every time Liveupdate runs it outputs what it is doing to the Log.Liveupdate
File Location: C:\Documents and Settings\All Users\Application Data\Symantec\Liveupdate\Log.Liveupdate
Search for the keyword “Start of new LU session".
Luresult.txt contains information related to the installation of the Liveupdate client.
File Location: C:\Program Files\Symantec\Liveupdate\Luresult.txt