You like to remove a mailbox server from DAG (Database Availability Group). However, when performing…
April 2024 Exchange Server Hotfix Updates
Microsoft releases several Hotfix Updates (HUs) for Microsoft Exchange Server on April 23, 2024. It includes fixes for non-security issues and introduces new features. These fixes and features will also be included in later cumulative updates for Exchange Server 2019.
Note: This update also includes all the updates that were included in the March 2024 security updates for Exchange Server.
Exchange Server Hotfix Updates
The April 2024 HU is available for the following builds of Exchange Server:
Read more on how to Install Exchange Hotfix/Security Update.
If you are not at these Exchange Server CU versions, please update right now and apply the above patch.
Read more on how to Install Exchange Cumulative Update.
Features introduced in this update
- Elliptic Curve Cryptography certificates support in Exchange Server 2016 and 2019
- Hybrid Modern Authentication support for OWA and ECP in Exchange Server 2019 CU14
Known issues in this update
- Calendar printing in OWA might not work unless CTRL+P keyboard shortcut is used. This will be addressed in a future update.
Issues that are fixed in this update
The following issues have been resolved in this update:
- “We can’t open this document” error in OWA after installing March 2024 SU
- Search error in Outlook cached mode after installing March 2024 SU
- OwaDeepTestProbe and EacBackEndLogonProbe fail after installing March 2024 SU
- Edit permissions option in the ECP can’t be edited
- Outlook doesn’t display unread message icon after installing Exchange Server March 2024 SU
- My Templates add-in doesn’t work after installing Exchange Server March 2024 SU
- Download domains not working after installing the March 2024 SU
FAQs
We installed the March 2024 SU. Should we install the April 2024 HU?
The April 2024 HU is an optional update, but it does also introduce support for ECC certificates and HMA for OWA/ECP. If you installed the March 2024 SU but did not experience any of known issues and you don’t need the new functionality, you do not need to install the April 2024 HU and can wait until the future SU (which will include known issue fixes from April HU).
We did not yet install the March 2024 SU. Do we have to install the March SU first before installing the April 2024 HU?
The April 2024 HU includes the same security updates as the March 2024 SU, while addressing known issues with the March 2024 SU. If you did not install the March 2024 SU, you can install the April 2024 HU directly and skip the March 2024 SU.
Our Exchange servers update automatically through Windows / Microsoft Update. We installed the March 2024 SU already. Will our servers automatically install the April 2024 HU?
The April 2024 HU will appear as an optional update for your servers.
Does the April 2024 HU contain any security updates not included in the March 2024 SU?
The security content of the April 2024 HU is the same as in March 2024 SU.
Will the two new features (support for ECC certificates and HMA for OWA/ECP) also be rolled into future updates, or must we install this specific HU to get them?
The April 2024 HU will be included in subsequent updates for Exchange Server. We are simply announcing that those two features are now supported starting with April 2024 HU.
Can April 2024 HU be uninstalled (if the need arises)?
Yes. HUs, like SUs, can be uninstalled.
Further information
What Others Are Reading
I have configured Hybrid Modern Authentication, will updating to the new HU have any effect?
Dear Ali!
I installed this update so my exchange server is full up to date, but after I imported a wildcard ECC certificate to my exchange server it doesnt recoginze as a valid certificate. If I ask get-exchangecertificate the ECC certificate doesnt show. If I use the get-exchangecertificate -thumbprint “ECC thumbprint” it said “Key Algorithm Unsupported”, as in the earlier version. Are there any trick to use ECC with exchange server?
Regards,
Blaise