Microsoft Warns Windows Server Updates May Disrupt Exchange Email — Here’s the Workaround

October Windows Server updates may disrupt Exchange email. Learn which servers are affected, the symptoms, and Microsoft's ...

Microsoft: October Windows Server updates break Exchange sign-in, mail flow

Microsoft has confirmed that this month's Windows Server security updates are causing OWA sign-in and mail delivery issues on some Exchange Server systems.
borncity

Windows/Exchange Server October 2026 issue: Analysis and Workarounds

German]The security updates for Windows Server released by Microsoft on October 13, 2026, are also affecting Microsoft Exchange Server. Reports on my German blog and across the internet indicate ...
Techzine Europe

Windows Server updates cause Exchange servers to become unstable

Microsoft warns that the October 2026 Windows Server updates may destabilize on-premises Exchange servers. OWA (Outlook on ...

October updates take down Exchange servers

Exchange servers go down after Windows Server’s October updates. Microsoft is investigating the issue.
Help Net Security

Exchange 2016, 2019 support ends soon: What IT should do to stay secure

Microsoft is ending support for Exchange Server 2016, Exchange Server 2019, and Outlook 2016 on October 14, 2025. That date might seem far off, but if you’re managing email systems or Office ...
Redmond

Microsoft Throws Exchange Server 2016 and 2019 a Support Lifeline

Microsoft this week announced it will be bringing its Extended Security Update (ESU) program for on-premises Exchange Server 2016 and 2019, offering organizations critical protection as they approach ...