Some users may be unable to sign in to Outlook.com through Chromium based browsers

All times are shown in UTC+01:00.

Stato MSFT365

Start: Jan 10, 2026 at 16:28 (UTC+01:00)

In Progress

User impact: Users may be unable to sign in to Outlook.com through Chromium based browsers.

More info: This issue only impacts users who sign in with a password. Those who sign in through Passkey or authentication prompts aren't impacted by this event. Affected users may be able to successfully sign in using a non-Chromium based browser, such as Firefox.

Current status: A recent configuration change to update the sign in flow is resulting in some password-based sign in requests being blocked. We’re reverting the affected configuration to a previous healthy version and monitoring the service as the change propagates across affected environments to ensure successful restoration.

Start time: Saturday, January 10, 2026, at 7:00 AM UTC

Next update by: Saturday, January 10, 2026, at 6:30 PM UTC

No updates posted yet for this event.