Cumulative Update 14 for Exchange 2019 is now available. With the new release model, it is officially called; The 2024 H1 Cumulative Update (CU) for Exchange Server 2019.
Exchange 2019 CU14 includes the following major changes;
- Extended Protection enabled by default
Originally released in August 2022, Exchange Server Extended Protection support will now be enabled by default. This applies to the server on which it is installed and will happen when running setup.
As setup does not validate EP readiness, make sure you run the Exchange Server Health Checker script and verify the Prerequisites for enabling Extended Protection on Exchange server.
To prevent setup from enabling EP, run setup from a command line wit either the /DoNotEnableEP or /DoNotEnableEPFEEWS switch. - CVE-2024-21410 information
To address CVE-2024-21410 (which got released today), you’ll need to enable Extended Protection. This also applies to any previous version of CU of Exchange 2019 as well as Exchange 2016 and even Exchange 2013 and not just Exchange 2019 CU14. For more information see; Exchange Server support for Windows Extended Protection. - .NET Framework 4.8.1 support on Windows Server 2022
There are 18 additional fixes documented for this release. A few notable ones are;
- KB5035443: Read receipts are returned if ActiveSyncSuppressReadReceipt is “True” in Exchange Server 2019
- KB5035453: Issues in Exchange or Teams when you try to delegate information
- KB5035455: MSExchangeIS stops responding and returns “System.NullReferenceExceptions” multiple times per day
- KB5035494: Modern attachment doesn’t work when web proxy is used in Exchange Server 2019
- KB5035495: OWA displays junk operations even if junk mail reporting is disabled
- KB5035542: Remote equipment and room mailboxes can now be managed through EAC
- KB5035617: Transport rules aren’t applied to multipart or alternative messages
This release does not include new updates to the Active Directory Schema for Exchange 2019.
Exchange 2019 is scheduled for later this year and will include support for TLS 1.3.
Exchange 2019: CU14 KB5035606 – Download
View: Blog post of the Exchange Team about CU14 for Exchange Server 2019
Note: Exchange 2016 has reached its Extended Support phase and CU23 was the last CU for it. This means that from now on, it will only receive Security Updates.
