Microsoft offers Update KB5018421 for Windows Server 22H2 …

Update[German]Microsoft has published security updates for Windows on October 11, 2022 – among others also the update KB5018421 for Windows Server 2022. So far so good – but now they already offer a security update for "Windows Server 22H2" – whereby it is unclear to me what this is about. It seems also that a new category with this name has been established in WSUS.


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German blog reader Thorsten pointed this out in this comment. Within the Microsoft Update Catalog there are two update packages listed by Microsoft for two server variants – once "Microsoft Server operating system-21H2" and also "Microsoft Server Operating System-22H2" (see the screenshot below).

Update KB5018421 für Windows Server 22H2

Any of you have an idea what this could mean? Is there a "yearly update" for Windows Server 2022 in the making, which once slipped out accidentally? At least German blog reader Siegfried B. writes here:

I would also like to know. If I click on the link in the update catalog, I get to the patch notes for Windows Server 2022. "Microsoft Server Operating System-22H2" is also a new category in WSUS.

Another user shared the following screenshot with me on FB showing the WSUS categories.

WSUS: Windows Server 22H2


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As Siegfried B wrote: Googling has brought nothing. But maybe someone of you has an idea – possibly it is the continuation of the September topic from my blog post WSUS chaos: Preview updates for Windows and Net withdrawn as superseded on 9/21/2022.

PS: It shouldn't actually be the Windows 10 22H2, since this is a client operating system. And all new server versions are supposed to be LTSC – the last semi-annual version was Windows Server 20H2, which is already out of support.

Addendum: I've raised the question on Twitter – but till now, the question hasn't been answered satisfactorily.

Addendum 2: The case are getting traction, Brandon LeBlanc has answerded:

Not sure but my guess is its a typo that mixes up Windows 11 version 22H2 with Windows Server 2022. Will have to look into it.

Windows Server 22H2

Another Microsoft employee @ariaupdated reached out and said it was an update for the Azure Stack HCI, which is updated once a year and applies to virtual machines in the Azure Cloud. This update is not available for on-premises servers. I pointed out that this was confusing – and she now wants to have this described more clearly by the people responsible …


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One Response to Microsoft offers Update KB5018421 for Windows Server 22H2 …

  1. Peter Pancir says:

    I set up a question on the MS Q&A forum some months ago. No one could answer for sure, but one answer is also "Azure Stack HCI version 22H2 (OS Build 20349)."

    New Product: Microsoft Server Operating System-22H2. What is it?

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