I did a search but had trouble narrowing down to my specific so, hopefully, this is not a repost.
Running Exchange 2016 Std virtualized in WS2016 Std environment. Installed CU20 fine. Rebooted. Now Exchange services takes 30 minutes to load and, usually, not everything starts. After waiting, I tend to need to manually start Frontend Transport and a few other required services.
Also, two other issues have propped up. After a while (not set time period), a CMD process pops up and uses 80-90%+ CPU and 4-6GB or memory. This grinds Exchange down to a halt. I log in and run Task Manager. When it comes to, I terminate that CMD process and everything is fine again.
The other issue is that I can no longer install any Microsoft Updates after CU20. It downloads and installs then I get the "reverting back" after a few reboots.
None of the old WS2012 Std / Exchange 2013 Std setups are affected. All the WS2016 Std/Exchange 2016 Std setups experience the same issue.
Thanks in advance,