Microsoft has released Update Rollup 23 for Exchange Server 2010. This is a security update which should be installed promptly.
Click here to download the UR 13 for Exchange 2010:
You can find more information about the update here:
The update requires the Visual C++ 2013 Runtime (this is a new requirement as with the newer Exchange Server versions). The Visual C++ Runtime can be downloaded here:
Exchange 2010 is already in Extended Support and therefore only receives security updates, so a migration to Exchange 2016 should at least be in the planning stage. A direct migration to Exchange 2019 will most likely not be possible.
I'm signing off for a few days now... enjoy my summer vacation... with a beautiful view 
Gibt schon wieder ein neues, Rollup 24:
https://support.microsoft.com/de-de/help/4458321/update-rollup-24-for-exchange-server-2010-service-pack-3
Danke für die Info und einen schönen Urlaub