Microsoft released the quarterly servicing update to Exchange Server 2013 – CU11 and updated UM Language Packs.

Cumulative Update 11 contains the latest set of fixes and builds upon Exchange Server 2013 Cumulative Update 10. The release includes fixes for customer reported issues, minor product enhancements and previously released security bulletins. A complete list of customer reported issues resolved can be found in Knowledge Base Article KB3099522.

You can read the full blog post at the Exchange Team Blog.
Download Cumulative Update 11 for Exchange Server 2013