Exchange 2016 CU5 has been released to the Microsoft download centre! Exchange 2016 has a different servicing strategy than Exchange 2007/2010 and utilises Cumulative Updates (CUs) rather than the Rollup Updates (RU/UR) which were used previously. CUs are a complete installation of Exchange 2016 and can be used to install a fresh server or to update a previously installed one. Exchange 2013 has the same servicing methodology.
This is build 15.01.0845.034 of Exchange 2016 and the update is helpfully named ExchangeServer2016-x64-CU5.iso which allows us to easily identify the update. Details for the release are contained in KB 4012106.
Note that CU6 will have changes and improvement to TLS, specifically TLS 1.2.
CU5 contains the latest time zone updates
As announced in the Exchange CU4 release post the .NET framework requirement has changed. Exchange 2016 CU5 requires .NET framework 4.6.2. Since .NET 4.62 framework support was first added in CU4, this adds an upgrade item. Ideally Exchange 2016 servers will already be on that CU4 build and .NET can be upgraded prior to installing CU5. If not, upgrade to CU4, do the .NET upgrade and then upgrade to CU5.
KB 4013606 Search fails on Exchange Server 2016 or Exchange Server 2013
KB 4012994 PostalAddressIndex element isnt returning the correct value in Exchange Server 2016
CU5 has some issues which could not be addressed prior to release.
Fixes for both issues are planned for CU6.
Exchange 2016 follows the same servicing paradigm for Exchange 2013 which was previously discussed on the blog. The CU package can be used to perform a new installation, or to upgrade an existing Exchange Server 2016 installation to this CU. Cumulative Updates are well, cumulative. What else can I say
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