Since the release of System Center 2012 R2 there have been (to date) 3 Cumulative Updates which if you wish to keep your clients upto date will need deploying into your ConfigMgr hierarchy.
During the OSD Process the most common place you will see this is below:
This can sometimes be problematic and prone to issues however there is another way…………
Note * The below has not had an official stamp off from Microsoft so please test and use at your own risk however this has worked since 2007 and I have not experienced any known issues.
After completing the installation of the CU on your site Server you will have the hotfix files placed in the following area:
\\[Site Server\SMS_[Site Code]\hotfix\[Hotfix KB]
Within the directory will be the packages you have decided to install.
If you drill into the ‘Client\[Platform]’ directory you will find the .MSP file in this case CU3 for ConfigMgr 2012 R2
Launch a new explorer Window to where the package for you ConfigMgr Client is (Default = \\[Site Server]\SMS_[SMS Site Code]\Client
Within this directory are the x64 and i386 folders respectivly.
For the example, drill into the i386 Folder and create a ‘ClientPatch’ Folder in this directory:
Now copy the MSP into this directory
Repeat this for the x64 directory ensuring you copy the right MSP into the right folder!
Simply update the package for your ConfigMgr Client Agent and your good to go 🙂
Note* – It may be worth performing the last action out of hours as it may interupt a newly initiated build process!