Download “Cumulative Update 2 for ConfigMgr 2012 SP2 and ConfigMgr 2012 R2 SP1” from
Extract the downloaded file.
Take a backup of the SCCM server and database before upgrading.
Start the upgrade process by execution CM12_SP2R2SP1CU2-KB3100144-X64-ENU.exe
Click Yes in the UAC Windows
Mark “I accept these license terms”
Click next to update the database
Click Next to upgrade all component, SCCM Concole, and Clients
And now you are ready to test the functionality of SCCM
Check the regedit to see the CU level for SCCM 2012 R2 Sp1
Console Version : 5.0.8239.1301
Version in SCCM Servicing Exension