SEP client upgrade from 11.0.6 into 12.1.5

Hi People,

All of my Windows Server 2008 server fleets are still using SEP client version 11.0.6005.562, so what is the supported and suggested steps to upgrade to 12.1.5 client ?

The workstations and the newer Windows Server 2012 server fleet are using 12.1.2015.2015 so I guess it is easier and faster time to upgrade them all.

so I guess it can be upgraded normally as expected.