Exchange Server 2013 Service Pack 1 Coming in Early 2014
The big news is here :)
Exchange Server 2013 Service Pack 1 Coming in Early 2014
Few notable improvements are:
- Windows Server 2012 R2 Support
- S/MIME support for OWA Support for S/MIME
- Edge Transport Server Role
For further details , check the Exchange team blog @ https://blogs.technet.com/b/exchange/archive/2013/11/20/exchange-server-2013-service-pack-1-coming-in-early-2014.aspx