Microsoft has released new updates for all supported Exchange Server versions. The September updates do not include security updates, but contain updates for hybrid scenarios. Click here to download the updates:
Microsoft writes about the updates:
The October 2025 SUs address vulnerabilities responsibly reported to Microsoft by security partners and discovered through Microsoft's internal processes. Although there are no known active exploits, we recommend installing these updates immediately to protect your environment.
As support for Exchange Server 2016 and 2019 has ended today, this update is the last security update for these two versions. Exchange Server SE is therefore the last supported version to receive security updates.
