Cumulative Update 3 for Microsoft Exchange Server 2016 was released on September 20, 2016. Several nonsecurity issues are fixed in this cumulative update or a later cumulative update for Exchange Server 2016.
You may have to restart the computer after you apply this cumulative update package.
You don't have to make any changes to the registry after you apply this cumulative update package.
After you install this cumulative update package, you can't uninstall the package to revert to an earlier version of Exchange Server 2016. If you uninstall this cumulative update package, Exchange Server 2016 is removed from the server.
Learn about the terminology that Microsoft uses to describe software updates.