SEP 11 to SEP 12.2 upgrade process
Best practices for upgrading to Symantec Endpoint Protection 12.1.2
Upgrading or migrating to Symantec Endpoint Protection (SEP) 12.1
SEP 11.x to SEP 12.1 Upgrade process graphical overview
Thanks In Advance
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)
Hope that helps!!
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