Released: Exchange Server 2013 Service Pack 1

@DavidR1 - The intent of the statement is to remind Admins that if they are utilizing Exchange services which span the service and their in-house deployment that the servers they maintain need to be updated regularly to our latest releases. This is necessary to avoid unintended inter-op issues between the servers they maintain and the ones deployed in O365. We don't expect this to occur on day one of our release, obviously. We do however expect that the customer will validate and proceed with deployment such that they are never more than 2 CU's behind the most recent release. That means today customers should be running CU2 or later and testing or deploying CU3 or later.