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MC1218934 Prevent or fix issuesMajor changeAdmin impact

Take Action: Out-of-band update to address issues observed with the January 2026 Windows security update

From Microsoft 365 Message Center Archive by Merill Fernando · Microsoft may not have sent this notice to your tenant.
Windows
Microsoft 365 admin center

Microsoft asks admins to prevent or fix an issue. Read what it asks below and check the linked documentation; whether your tenant is affected is not known here.

What the notice says

Microsoft’s text, safely structured

Microsoft has identified issues upon installing the January 2026 Windows security update. To address these issues, an out-of-band (OOB) update was released today, January 17, 2026.

  • Connection and authentication failures in remote connection applications: This issue affects multiple platforms including Windows 11, version 25H2; Windows 10, version 22H2 ESU; and Windows Server 2025. See the bottom of this message for the complete list of affected products.
  • Devices with Secure Launch might fail to shut down or hibernate: This issue only affects Windows 11, version 23H2.

The out-of-band (OOB) update was released today, January 17, 2026, in the Microsoft Update Catalog. If you have not yet deployed the January 2026 Windows security update and your IT environment includes the affected applications and features, we recommend applying this OOB update instead. For more information and installation instructions, refer to the appropriate KB article for each affected version of Windows listed below. For additional guidance, see How to download updates from the Microsoft Update Catalog.

  • Windows 11, versions 25H2 and 24H2 (KB5077744)
  • Windows 11, version 23H2 (KB5077797)
  • Windows 10, version 22H2 ESU and Windows 10 Enterprise LTSC 2021 (KB5077796)
  • Windows Server 2025 (KB5077793)
  • Windows Server 2022 (KB5077800)
  • Windows Server 2019 and Enterprise LTSC 2019 (KB5077795)

What changed

Between archive captures, newest first

The archive supplies one version of this notice.

Learn more

Links from the notice and their documentation checks

No related evidence found in this installation's recent collection. This does not establish that no announcement exists.

Not confirmed here

What this page cannot tell you
  • Whether your tenant is affected: this is Microsoft's notice, not a check of your settings.
  • 9 linked pages have not been read yet.
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