Looks like an entertainment is coming.
This is the first new type updates – Cumulative Update 1, 1.3Gb size, requires AD schema update and provides compatibility with previous versions Exchange.
Links bullet style:
- Exchange Team Blog article
- Download Exchange 2013 CU1
- Exchange 2013 CU1 Release Notes
- High Availability Changes in Exchange Server 2013 Cumulative Update 1 on Scott Schnoll’s blog