Windows 11 KB5124008 Update Breaks Active Directory Domain Trust and Blocks User Logins
Thu Sep 17 2026
IAM
BRAND:Microsoft
Windows
Patch Management
Vulnerability
cybersecuritynews.com
Microsoft is investigating reports that the Windows 11 KB5124008 security update is breaking Active Directory domain trust on some enterprise computers, leaving users unable to sign in with valid credentials. The problem appears linked to Machine Identity Isolation, although Microsoft has not confirmed the root cause or published an official workaround. Released on September 8, […]
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