SEP 11 to SEP 12.2 upgrade process
HI,
Best practices for upgrading to Symantec Endpoint Protection 12.1.2
http://www.symantec.com/docs/TECH163700
https://www-secure.symantec.com/connect/articles/upgrade-process-sep-121-ru1-mp1-sep-121-ru2
Upgrading or migrating to Symantec Endpoint Protection (SEP) 12.1
http://www.symantec.com/business/support/index?page=content&id=TECH163602
SEP 11.x to SEP 12.1 Upgrade process graphical overview
https://www-secure.symantec.com/connect/articles/sep-11x-sep-121-upgrade-process-graphical-overview
http://www.symantec.com/business/support/index?page=content&id=TECH163700
Hello,
Here are few Articles which may assist you.
Latest Symantec Endpoint Protection Releases - SEP 12.1 RU2 and SEP 11.0 RU7 MP3
Knowledgebase Articles for Symantec Endpoint Protection 12.1. RU2
Upgrading or migrating to Symantec Endpoint Protection 12.1.2 (RU2)
http://www.symantec.com/docs/TECH197426
Hope that helps!!