# KB5124008

Published articles for KB5124008.

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## Microsoft shares workaround for Windows domain login issues

DevFeed: [Microsoft shares workaround for Windows domain login issues](<https://devfeed.tech/articles/microsoft-shares-workaround-for-windows-domain-login-issues-48093.md>)

Original publisher: [Read original article](<https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-workaround-for-windows-domain-login-authentication-issues/>)

Author: Sergiu Gatlan

Published: 2026-09-17T08:24:48Z

Content type: news

Language: en

Sources: [BleepingComputer](<https://devfeed.tech/sources/bleepingcomputer.md>)

Topics: [Microsoft](<https://devfeed.tech/topics/microsoft.md>), [Windows](<https://devfeed.tech/topics/windows.md>), [Authentication](<https://devfeed.tech/topics/authentication.md>), [bug](<https://devfeed.tech/topics/bug.md>), [Security](<https://devfeed.tech/topics/security.md>), [Social engineering](<https://devfeed.tech/topics/social-engineering.md>)

Tags: [2026](<https://devfeed.tech/tags/2026.md>), [authentication](<https://devfeed.tech/tags/authentication.md>), [bug](<https://devfeed.tech/tags/bug.md>), [computer-help](<https://devfeed.tech/tags/computer-help.md>), [computers](<https://devfeed.tech/tags/computers.md>), [credentials](<https://devfeed.tech/tags/credentials.md>), [domain-trust](<https://devfeed.tech/tags/domain-trust.md>), [kb5124008](<https://devfeed.tech/tags/kb5124008.md>), [known-issue](<https://devfeed.tech/tags/known-issue.md>), [linux](<https://devfeed.tech/tags/linux.md>), [mac](<https://devfeed.tech/tags/mac.md>), [malware](<https://devfeed.tech/tags/malware.md>), [malware-removal](<https://devfeed.tech/tags/malware-removal.md>), [microsoft](<https://devfeed.tech/tags/microsoft.md>), [security](<https://devfeed.tech/tags/security.md>), [september-2026](<https://devfeed.tech/tags/september-2026.md>), [spyware](<https://devfeed.tech/tags/spyware.md>), [support](<https://devfeed.tech/tags/support.md>), [tech-support](<https://devfeed.tech/tags/tech-support.md>), [technical-support](<https://devfeed.tech/tags/technical-support.md>), [virus](<https://devfeed.tech/tags/virus.md>), [virus-removal](<https://devfeed.tech/tags/virus-removal.md>), [windows](<https://devfeed.tech/tags/windows.md>), [windows-11](<https://devfeed.tech/tags/windows-11.md>), [windows-domain](<https://devfeed.tech/tags/windows-domain.md>), [windows-security](<https://devfeed.tech/tags/windows-security.md>), [windows-server](<https://devfeed.tech/tags/windows-server.md>)

### AI overview

Microsoft released a temporary workaround for Windows 11 domain-login failures caused by September 2026 security updates. The updates can trigger Machine Identity Isolation enforcement, leading to domain trust and sign-in errors for users with valid credentials. Administrators are advised to disable the feature in affected environments that do not use Windows Server 2025 domain controllers.

### Source excerpt

Microsoft shared a temporary fix on Wednesday for a known issue that prevents Windows 11 users from logging in with valid domain credentials after installing the September 2026 security updates. [...]