Microsoft has just released a number of new KB articles that describes how to maintenance and troubleshoot software updates in Configuration Manager 2012.

Those are:

 Happy reading 

Microsoft just released a new hotfix KB3079897 for ConfigMgr 2012 R2 SP1 CU1.

"Conditional Access is slow to unblock devices for email access in System Center Configuration Manager"

Symptoms

When you run Microsoft System Center 2012 R2 Configuration Manager Service Pack 1 or System Center 2012 Configuration Manager Service Pack 2 on a server, you may experience the following performance issue or race condition:•Performance issue

After Conditional Access is enabled and deployed, and devices are enrolled and compliant with the compliance policies that are deployed, performance tests reveal up to a 10-minute delay to unblock devices so that they start to receive email messages. The unblocking of devices occurs when compliance messages are received through a fast channel. This processing had dependencies that caused delays. More...