Issues that this cumulative update fixes


  • The Cumulative Update 12 package can be used to run a new installation of Exchange Server 2013 or to upgrade an existing Exchange Server 2013 installation to Cumulative Update 12.
  • It is not necessary to install any Exchange Server 2013 Cumulative Updates or Service Packs released prior to Cumulative Update 12 before you install Cumulative Update 12.

Again I’m going to write about why and what are most important reasons to upgrade. In my opinion the issues either are high visible to end-user or related to end-user productivity or impacting on the production.

So if you are still on Exchange 2013 Cu11, this is the time to upgrade it to Cu12 and it’s been already released since last month as of March 15, 2016. Next update will be sometime in June. So there are still some very good reasons to upgrade to Exchange 2013 CU12.

You can download the Exchange 2013 CU12 from here