In the previous post, I shared that Microsoft has changed the update service for exchange servers.
It has been announced that the updates will now be released as H1 and H2, at which point the updates for the first 2021 H1 have been released.
It is reported that the new released cumulative updates(CUs) include previous security updates(SUs) and fixes for customer reported.
These updates are available for the following specific builds of Exchange Server:
Exchange Server 2019 CU12
Exchange Server 2016 CU23 (The latest cumulative update package of Exchange 2016 won’t be H2 ! )
Please check knowledge base articles for known issues via CU12 or CU23
Further Information and Guidance
Exchange Team Blog
Upgrade Exchange to the latest Cumulative Update
Exchange Updates Step-by-Step Guide
How to Find Exchange Version and Build Number
Have a nice day !