Hi,
Current environment consisting Exchange 2013 CU2 running on windows 2012. Two CAS in HLb. Two mailbox servers in DAG we are planning to upgrade to Exchange 2013 CU3.
I have checked for Known issue found below blog article.
http://blog.jasonsherry.net/2013/11/25/exchange-2010-sp3-ru3-2013-cu3-released/
is there any other known issues experienced please let me know.
While applying Exchange 2013 CU3 we are going to start from CAS and putting DAG nodes in maintenance mode (one by one) we will be applying CU3 on mailbox servers is there anymore precautions need to taken please advice.