Exchange 2013 Cumulative Update 6 is out!
The Exchange Team has released the latest CU for Exchange 2013, which is CU6.
Deployments running any previous release of Exchange 2013 can move directly to CU6. Same goes for companies deploying Exchange 2013 for the first time, they can skip previous releases and start their deployment with CU6 as well.
A complete list of customer reported issues resolved in Exchange 2013 CU6 can be found in KB 2961810
CU6 includes significant improvements in Public Folder scalability, read here.
Download the 2013 CU6 here.