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Mecm 2503 - Feature Update "Windows 11, version 25H2 x64 2025-10" shows compliant for Win11-24H2 computers

Steve Pogue 71 Reputation points
2025-11-03T18:18:38.3833333+00:00

Currently working on testing Windows 11 V.25H2 feature update from Win11 24H2 and it keeps coming up in MECM as a false positive already compliant. Currently running MECM Version 2503.

I can image a new machine without issue and it images to 25H2 without issue.

I can see the 25H2 feature update "Windows 11, version 25H2 x64 2025-10" in MECM Windows Servicing. After downloading and deploying it to a collection with Win11 24H2 installed, it shows up as already compliant, but the computers never move from 24H2 to 25H2.

The Win 11 24H2 computers are patched 2025-10 KB5066835

Any assistance with this would be greatly appreciated.

Microsoft Security | Intune | Configuration Manager | Updates
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  1. Steve Pogue 71 Reputation points
    2025-11-06T18:14:51.7466667+00:00

    After a bit of time researching and debugging, I think I have answered my own question.

    Compliance for a deployment can state "Compliant" for both of these situations:

    1. The client needs this update and has installed this update.
    2. The client does not need this update

    Although I can find no documentation stating this, I have come to the conclusion that the feature update from 24H2 to 25H2 must match at the release month level with the cumulative update.

    Feature Update "Windows 11 25H2 2025-10" will ONLY install on a 24H2 computer with 2025-10 Cumulative update installed.

    Feature Update "Windows 11 25H2 2025-10" will NOT install on a 24H2 computer with 2025-09 Cumulative update installed. Since there is a mismatch in the patch level, the feature update will not install and the deployment will be marked COMPLIANT because the client does not need it.

    If my case, many of the 24H2 test clients were at 2025-09 patch level so the 25H2 feature update 2025-10 would not install.

    I hope this helps someone else.

    featureupdates

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