New Cumulative Updates for Exchange Server 2013, 2016 and 2019 were released today. Click here to go directly to the downloads (the links may not work directly, just try again later):
- Exchange Server 2019 Cumulative Update 2, VLSC Download
- Exchange Server 2016 Cumulative Update 13
- Exchange Server 2013 Cumulative Update 23
CUs for Exchange 2019 cannot be downloaded publicly, but are only available via VLSC, Visual Studio (MSDN) or Action Pack.
Details on the updates can be found here:
- Exchange Server 2019 Cumulative Update 2
- Exchange Server 2016 Cumulative Update 13
- Exchange Server 2013 Cumulative Update 23
Click here for the article about the updates on the Exchange Team Blog:
Before the updates are installed, the Visual C++ 2012 Runtime must be installed. You should also run "setup.exe /prepareAD" before installation. Exchange now supports .NET Framework 4.8.
Here you can find an article about points that need to be considered when installing CUs for Exchange 2016:
Exchange 2016: Install cumulative updates (CU)
Windows Defender and other virus scanners in particular should be deactivated for the duration of the installation, as they tend to cause problems during the update. Windows Defender in particular ensures that Exchange CUs take several hours to install.
The Server Component States should also be checked after installing an update; the relevant information can be found here:
Exchange 2016: Server Component States
Here you can also find an article about possible stumbling blocks in the .NET Framework dependencies of the CUs for Exchange 2013 and Exchange 2016:
Exchange 2013: Stumbling block when updating an old version to the current CU
