Cumulative Update 9 for Exchange Server 2013 and UM Language Packs are now available on the Microsoft Download Center.
Cumulative Update 9 contains the latest set of fixes and builds upon Exchange Server 2013 Cumulative Update 8. The release includes fixes for customer reported issues,
One feature is implemented which can be interesting for a lot of customers who are using Shared Mailboxes with Exchange 2013.
A copy of the sent message is copied to the send Items Folder of the Shared Mailbox.
For more information see: More Control over Shared Mailboxes