Microsoft has released security updates for vulnerabilities found in any version of:
Exchange Server 2013
Exchange Server 2016
Exchange Server 2019
These updates are available for the fol...
Updated Feb 24, 2022
Version 3.0
Blog Post
XIMIAEX2016 CU22 was released 28/09/2021, so If we don't get it until half of next month, it will be likely June or later - that's a good scenario
worse one is: Mainstream Support for 2016 ended over 12m ago, so it could also be that we will be getting SU updates only - same as for Exchange 2013, which received last CU in 2019, and now over 7SU updates.
you can check release date of CU updates at link below:
https://docs.microsoft.com/en-us/exchange/new-features/build-numbers-and-release-dates?view=exchserver-2019#exchange-server-2016
Regards, Hubert