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Microsoft Exchange 2013 – 2016 September 2017 Update

Microsoft Exchange 2013 – 2016 September 2017 Update

Microsoft made the latest CU (cumulative Updates) available for both Exchange 2013 and Exchange 2016. These updates include fixes which was reported by customers as well as includes security updates.

During a previous post from Microsoft, they have informed customers that a minimum Active Directory forest functional level would be forced to 2008R2 (Active Directory Forest Functional Levels for Exchange Server 2016), This update enforces the announcement from Microsoft. The change will require all Domain controllers in the forest to have a functional level of 2008R2 or higher.

The Active Directory Forest requirement for Exchange 2013 remains unchanged.

.Net Framework is another announcement which was made and this is what the Exchange Team has said about .NET Framework 4.7.1.

“The .NET team is preparing to release a new update to the framework, .NET Framework 4.7.1.  The Exchange Team will include support for .NET Framework 4.7.1 in our December Quarterly updates for Exchange Server 2013 and 2016, at which point it will be optional.  .NET Framework 4.7.1 will be required on Exchange Server 2013 and 2016 installations starting with our June 2018 quarterly releases.  Customers should plan to upgrade to .NET Framework 4.7.1 between the December 2017 and June 2018 quarterly releases.

The Exchange team has decided to skip supporting .NET 4.7.0 with Exchange Server.  We have done this not because of problems with the 4.7.0 version of the Framework, rather as an optimization to encourage adoption of the latest version.”

Known Issues Which Is unresolved:

The following is known issues which is still unresolved and will be resolved in future updates.

  • Online Archive Folder created in Office 365 will not appear in the Outlook on the Web UI.
  • Information protected E-Mails may show hyperlinks which are not fully translated to a supported, local language.

Release Details:

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

Things to take note of for CU 7 for Exchange 2016

  • The update is that it will update Active Directory Schema.
  • If upgrading from an older version of Exchange or installing a new server, Active Directory updates may still be required.
  • Active Directory update will automatically apply if the logged-on user has the required permissions.

Things to take note of for CU 18 Exchange 2013

  • Exchange 2013 CU 18 does not include Active Directory updates.
  • CU 18 may add additional RBAC definitions to your existing configuration.
  • PrepareAD should be executed prior to upgrading any server to CU 18.
  • PrepareAD will automatically run during the first upgrade if the Exchange setup detects this is required and the logged-on user has the required permissions.


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