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Exchange 2016 CU 6 Released

Latest Exchange 2016 CU 6 released in June 2017

The Latest Cumulative Update for Exchange 2016 and now available for download. The latest releases includes fixes and issues reported as well as updated functionality.

Updated functionality in Cumulative Update 6

With CU 6 the Exchange team added two highly anticipated features; Sent Items Behavior Control and Original Folder Item Recovery. These features are targeted to Exhange 2016 and will not be included the Exchange 2013.

The Cumulative Update 6 behavior is more closely aligned with how this worked in Exchange Server 2010. Due to architectural differences, the configuration of this feature is not retained if mailboxes are moved between Exchange Server 2010 and Exchange Server 2016 or between Exchange Server 2013 and Exchange Server 2016.

Latest time zone updates

All of the packages released today include support for time zone updates published by Microsoft through May 2017.

TLS 1.2 Exchange Support Update


Previously the Exchange Team announced that Cumulative Update 6 would include support for TLS 1.2. The updates which was released now does have improved support for TLS 1.2 but the team is not encouraging customers to move to a TLS 1.2 only environment at this time. The Exchange Team is working with the Windows and .Net teams to make configuring TLS 1.2 a more streamlined experience. Customers should continue to watch this space and be prepared to deprecate TLS 1.0 and 1.1 in the near future.

.Net Framework 4.7 compatibility with these releases

The Exchange team is still completing validation of the June releases with .Net Framework 4.7.  No compatibility issues has been found at this time, but the Exchange Team is asking customers to delay using .Net Framework 4.7 until they have completed validation. Once this validation is complete they will provide further guidance on .Net Framework 4.7 and Exchange Server.

Release Details

KB articles that describe the fixes in each release are available as follows:

Exchange Server 2016 Cumulative Update 6 does include new updates to Active Directory Schema. If upgrading from an older Exchange version or installing a new server, Active Directory updates may still be required. These updates will apply automatically during setup if the logged on user has the required permissions. If the Exchange Administrator lacks permissions to update Active Directory Schema, a Schema Admin must execute SETUP /PrepareSchema prior to the first Exchange Server installation or upgrade. The Exchange Administrator should execute SETUP /PrepareAD to ensure RBAC roles are current.

Additional Information

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., 2013 CU17, 2016 CU6) or the prior (e.g., 2013 CU16, 2016 CU5) Cumulative Update release.

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Published inActive DirectoryCloudExchange 2013Exchange 2016Exchange ServerPowerShellWindowsWindows Server 2012Windows Server 2016

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