Microsoft has acknowledged that the October 2026 Windows Server updates may be destabilizing Exchange Server. The problems are related to this list of Windows Server updates (see here) and Microsoft ...

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 ...

Microsoft confirms October 2026 Windows updates are causing Exchange Server failures and shares a temporary workaround for ...

Microsoft released out-of-band Exchange Server security update that fixes a high-severity mailbox access vulnerability (CVE-2026-96940).

Microsoft warned that Exchange 2016 and Exchange 2019 will reach the end of support six months from now, on October 14. The Exchange Server Engineering Team also shared guidance for admins who need to ...

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

Microsoft has announced upcoming end of life for two of its key products, Exchange Server 2016 and Dynamics 365 Project Service Automation (PSA), in 2025. First up, Exchange Server 2016 will reach the ...

Microsoft ends security updates for Exchange Server 2016 and 2019 and Skype for Business Server 2015 and 2019 after the October 2026 patches.

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.

Microsoft patches CVE-2026-96940, which lets authenticated attackers read other users' Exchange mailboxes within the same organization.