Exchange Server 2013 CU3 New enhancements and improvements.

New enhancements and improvements to existing functionality have also been added for Exchange Server 2013 customers:

• Usability improvements when adding members to new and existing groups in the Exchange Administration Console
• Online RMS available for use by non-cloud based Exchange deployments
• Improved admin audit log experience
• Windows 8.1/IE11 no longer require the use of OWA Light - Finally!

For all latest fixes Microsoft Exchange Server 2013 CU3:

http://support.microsoft.com/kb/2892464