Today we are announcing the availability of the 2024 H1 Cumulative Update (CU) for Exchange Server 2019 (aka CU14). CU14 includes fixes for customer reported issues, a security change, and all previo...
Updated Feb 22, 2024
Version 11.0
Blog Post
The first FAQ here (https://learn.microsoft.com/en-us/exchange/plan-and-deploy/post-installation-tasks/security-best-practices/exchange-extended-protection?view=exchserver-2019) says the following. This doesn't sound right. Need to install Aug 2022 SU after installing a newer CU? We are currently on Exchange 2019 CU13 latest SU and planning to install CU14 with Extended Protection enabled as part of the install.
Question: Is it required to install the August 2022 Security Update (SU) if it was already installed on the previous Cumulative Update (CU)?
Answer: Yes, it's required to install the August 2022 SU again if you update to a newer CU build (for example, Exchange Server 2019 CU11 to Exchange Server 2019 CU12).
Remember: If you plan to do the update immediately (means CU + SU installation), Extended Protection doesn't need to be switched off. If you plan to stay on the CU without installing the SU immediately, you must disable Extended Protection as the CU build (without the SU being installed), doesn't support Extended Protection and therefore, you might experience client connectivity issues.