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"

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"