i installed SEPM 12.1.5 on Windows server 8. i tried to update using liveupdate but its failed to update. what is the reason???
You need to post the log.liveupdate
Without any logs or error message, we would have no idea.
Troubleshoot LiveUpdate and definition issues with Endpoint Protection Manager
Have you tried updating with the JDB file?
Download .jdb files to update definitions for Endpoint Protection Manager
Check this
https://support.symantec.com/en_US/article.TECH105924.html
have you try update manually SEPm server through .JDB file ?
https://support.symantec.com/en_US/article.TECH102607.html