Download “Cumulative Update 2 for ConfigMgr 2012 SP2 and ConfigMgr 2012 R2 SP1” from

https://support.microsoft.com/en-us/kb/3100144

Extract the downloaded file.

488307_ENU_x64_zip.exe

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

Click Next

Mark “I accept these license terms”

Click Next

Click Next

Click Next

Click next to update the database

Click Next to upgrade all component, SCCM Concole, and Clients

Click Next

Click Next

Click Next

Click Install

Click Next

Click Finish

And now you are ready to test the functionality of SCCM

Check the regedit to see the CU level for SCCM 2012 R2 Sp1

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SMS\Setup]

Console Version : 5.0.8239.1301

Version in SCCM Servicing Exension