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Out-of-band update released to address Windows licensing and activation errors

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

Microsoft’s text, safely structured

Microsoft has released a new Windows out-of-band (OOB) update today, November 13, 2026, to address an issue that affects a limited number of enterprise devices after installing the November 2026 Windows security update. Certain Windows licensing and activation operations using the Software Licensing Management Tool (SLMGR) might fail with error 0x80041008 (Invalid parameter). This primarily affects organizations using slmgr.vbs commands or automated processes to configure Key Management Service (KMS) activation, install product keys, or manage Windows licensing. Devices that are already activated remain activated. This cumulative update includes the improvements from the November 2026 Windows security update.

For Windows Server 2025, Windows Server 2022, Windows Server 2019, and the Windows 10 editions listed below, the optional non-security OOB update is available only from the Microsoft Update Catalog. For Windows 11, version 23H2, the optional non-security OOB update is available from the Microsoft Update Catalog and through Windows Update. Go to Settings > Windows Update > Advanced options > Optional updates to download and install it.

For complete guidance and installation instructions, see the relevant KB articles:

  • Windows Server 2025: KB5136489
  • Windows Server 2022: KB5136487
  • Windows Server 2019 and Windows 10 Enterprise LTSC 2019: KB5136490
  • Windows 11, version 23H2: KB5136483
  • Windows 10, version 22H2 ESU and Windows 10 Enterprise LTSC 2021: KB5136493

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

Shared KB KB5136487

Shared KB KB5136489

Shared KB KB5136490

Shared KB KB5136493

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.
  • 8 linked pages have not been read yet.
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