Hi,

This video demonstate upgrade process graphical overview from SEP 11 RU7 MP2 to RU7 MP3.

Prior to an upgrade please take the necessary backup.

http://www.symantec.com/docs/TECH102333

Release Notes: http://www.symantec.com/docs/DOC6158

Refer this article as well:

Migrating to Symantec Endpoint Protection 11.0.7300 (RU7 MP3)

http://www.symantec.com/docs/TECH199189

Video Upload: 

SEPM 11 RU7 MP2 to RU7 MP3 Upgrade Process Graphical Overview.mp4