# Microsoft investigates Windows 11 domain-trust failures

_Published Wednesday, September 16, 2026 at 6:08 PM EDT · Security, Products · Latest · Tier 2 — Notable_

![Microsoft investigates Windows 11 domain-trust failures — Primary](https://www.bleepstatic.com/content/hl-images/2024/10/02/Windows_11_headpic.jpg)

Microsoft is investigating reports that the Windows 11 KB5124008 security update breaks domain trust relationships on some enterprise systems, preventing valid domain users from signing in. Administrators reported that affected devices lost their Active Directory secure channel after installation and reboot. Some reports link the failures to Machine Identity Isolation, but Microsoft has not confirmed the cause or issued an official workaround. Administrators should note that Microsoft documentation warns changing that feature can also break domain authentication.

## Sources

- [BleepingComputer](https://www.bleepingcomputer.com/news/microsoft/windows-11-kb5124008-update-breaks-domain-trust-for-some-users/)

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Canonical: https://techandbusiness.org/newswire/y3XCyuBMOLasWtwUjcncBT
Published: 2026-09-16T22:08:04.684Z
Story chronology: 2026-09-16T20:39:29.000Z
Retrieved: 2026-09-16T23:59:25.618Z
Publisher: Tech & Business (techandbusiness.org)