Antivirus on Netbackup master / media /opscenter server

hi Team, 

Do we have any official note from symantec that antivirus should not run on master , media and opscenter servers which can impact backups.

I have seen the notes that netbackup files need to exclude from antivirus scanning on master , media servers. But I donot want AV to install on master/media servers for that I need to provide strong reason.

any suggestion please.