This question should be posted on Symantec site :-)
anyway, here are some links
Hope this helps
See McAfee knowledgebase article KB68701
You may also need to setup or modify the rule 'Prevent mass mailing worms from sending email' if you are using the notify via email when jobs complete in Backup Exec. I added the process beserver.exe (for BEX 12.5) and email notification is now working. McAfee might want to consider adding this to the list of whitelisted processes.