Released: June 2026 Exchange Server Security Updates (opens in new tab)

NOTE: Our partners in documentation publishing notified us of an issue that is causing documentation on learn.microsoft.com domain to not show latest documentation version. The issue is being worked on. Microsoft has released Security Updates (SUs) for vulnerabilities found in: Exchange Server Subscription Edition (SE) Exchange Server 2019 Exchange Server 2016 SUs are available for the following specific versions of Exchange Server: Exchange SE RTM Exchange Server 2019 CU14 and CU15 (to acces...