The Exchange team is announcing the availability of our latest quarterly update for Exchange Server 2013 as well as updates for Exchange Server 2010 Service Pack 3 and Exchange Server 2007 Service Pack 3.
Cumulative Update 11 for Exchange Server 2013 and UM Language Packs are now available on the Microsoft Download Center. 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. Customers running any previous release of Exchange Server 2013 can move directly to Cumulative Update 11. Customers deploying Exchange Server 2013 for the first time may skip previous releases and start their deployment with Cumulative Update 11 directly.
Cumulative Update 11 does not include updates to Active Directory Schema, but may add additional RBAC definitions to your existing configuration. PrepareAD should be executed prior to upgrading any servers to CU11. PrepareAD will run automatically during the first server upgrade if Setup detects this is required and the logged on user has sufficient permission.
We are also releasing Update Rollup 12 for Exchange Server 2010 Service Pack 3 (KB3096066). The Exchange Server 2010 update includes a DST update as well as a collection of important fixes. Update Rollup 18 for Exchange Server 2007 Service Pack 3 (KB3078672) is also being released. Update Rollup 18 is primarily a DST fix with an additional opportunistic fix.
We would like to call attention to two particularly important changes included in these updates:
Cumulative Update 11 and Update Rollup 12 each contain a time zone calculation fix to resolve the issue reported in KB3048372 – Exchange Calendar Items are shifted incorrectly when some Windows DST updates are applied. Customers in impacted time zones are encouraged to deploy these updates to address the issue identified after the release of the OS time zone changes in KB3039024.
Cumulative Update 11 also includes a change in behavior when deploying/administering Exchange Server 2013 in a co-existent manner with Exchange Server 2010 or 2016. These changes are outlined in the following blog article: Exchange Management Shell and Mailbox Anchoring.
For our customers running Exchange Server 2016, Exchange Server 2016 Cumulative Update 1 will be added to our next set of quarterly updates for Exchange Server.
Microsoft recommends all customers test the deployment of any update in their lab environment to determine the proper installation process for your production environment. For information on extending the schema and configuring Active Directory, please review the appropriate TechNet documentation.
Also, to prevent installation issues you should ensure that the Windows PowerShell Script Execution Policy is set to “Unrestricted” on the server being upgraded or installed. To verify the policy settings, run the Get-ExecutionPolicy cmdlet from PowerShell on the machine being upgraded. If the policies are NOT set to Unrestricted you should use the resolution steps in KB981474 to adjust the settings.
Reminder: Customers in hybrid deployments where Exchange is deployed on-premises and in the cloud, or who are using Exchange Online Archiving (EOA) with their on-premises Exchange deployment are required to deploy the most current (e.g., CU11) or the prior (e.g., CU10) Cumulative Update release.