Cumulative Update 3 for System Center Configuration Manager 2012 R2 SP1 has been released https://support.microsoft.com/en-us/kb/3135680,
and if not already on System Center Configuration Manager (Current Branch) lets take a closer look at how to determine the installation status of this cumulative update:
Remember that you will only see the prompt about Automatic Client Update if you have automatic client upgrade feature is enabled.
Read more about Automatic Client Update her Automatically updating the Configuration Manager client
After upgrading to System Center Configuration Manager 2012 R2 SP1 CU3, you will be able to identify the update as shown here.
First let us take a look at the console, after the update the console reports version 5.0.8239.1403
The console reported version 5.0.8239.1301 before updating which is 2012 R2 SP1 CU2.
The Console update is also listed in Control Panel as an Installed Update.
The site will still report version 5.00.8239.1000 after the update (Also shown after the console version in above pictures).
In order to check if the update has been applied we must look in the registry.
Before updating CULevel reported 2 because Cumulative Update 2 was installed.
This update is also visible under Installed Updates in Control Panel.
The client will report 5.00.8239.1403 after it has been updated.
With these components updated:
Before updating the client reported 5.00.8239.1301 for a 2012 R2 SP1 CU2 client:
CU2 includes the same update for SCEP as CU1 and CU2.
See Has SCCM 2012 R2 SP1 CU1 been installed?
All SCEP client should never the less be at version 184.108.40.206 from may 2015.
Finally be aware of this statement from the support page:
After this cumulative update is installed on site servers, any operating system boot image should be updated!