Some ChromeOS customers experiencing issues signing on.
**Description:**
We are experiencing an issue with ChromeOS M-139.
Our engineering team continues to investigate the issue.
We will provide more information by Wednesday, 2025-08-27 13:00 US/Pacific with current details.
We apologize to all who are affected by the disruption.
**Symptoms:**
Authentication failures are occurring on ChromeOS M-139, affecting Single Sign-On (SSO) with educational partners Clever and Classlink. The issue is also causing 2-Step Verification (2SV) to fail for some users.
**Workarounds:**
There are 2 workarounds and you can follow one of them.
1. Rollback to the previous version M138. Detailed instructions https://support.google.com/chrome/a/answer/12569990.
OR
2. Change LoginAuthenticationBehavior (https://chromeenterprise.google/policies/#LoginAuthenticationBehavior) to "Authentication via the default GAIA flow"
ResolvedMinor
August 27, 2025 - Started 5 months ago
- Lasted 1 day
Incident Report
Some ChromeOS customers experiencing issues signing on.
**Description:**
We are experiencing an issue with ChromeOS M-139.
Our engineering team continues to investigate the issue.
We will provide more information by Wednesday, 2025-08-27 13:00 US/Pacific with current details.
We apologize to all who are affected by the disruption.
**Symptoms:**
Authentication failures are occurring on ChromeOS M-139, affecting Single Sign-On (SSO) with educational partners Clever and Classlink. The issue is also causing 2-Step Verification (2SV) to fail for some users.
**Workarounds:**
There are 2 workarounds and you can follow one of them.
1. Rollback to the previous version M138. Detailed instructions https://support.google.com/chrome/a/answer/12569990.
OR
2. Change LoginAuthenticationBehavior (https://chromeenterprise.google/policies/#LoginAuthenticationBehavior) to "Authentication via the default GAIA flow"
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