Outlook and Hotmail users unable to authenticate in Secure Reader and Secure Share

Update timeline

1. investigating Mar 12, 2026, 12:11 PM UTC

   Outlook and Hotmail users are unable to authenticate in Secure Reader and Secure Share. Google and O365 activation flows are working as expected. The issue appears to be isolated to Outlook related authentication flows in Secure Reader and Secure Share. We are actively investigating the issue and will provide another update as soon as possible. Impacted users should attempt to authenticate via a different method, such as a one-time verification link or code.

2. investigating Mar 12, 2026, 01:36 PM UTC

   We are continuing to investigate the issue.

3. identified Mar 12, 2026, 04:40 PM UTC

   The issue has been identified and a fix is being implemented. We will provide another update as soon as possible.

4. identified Mar 12, 2026, 07:46 PM UTC

   We are continuing to work on getting a fix out as soon as possible.

5. identified Mar 12, 2026, 09:50 PM UTC

   We are continuing to work on getting a fix out as soon as possible. Impacted users should authenticate via one-time verification link or code.

6. resolved Mar 13, 2026, 03:52 PM UTC

   This issue has been resolved. We will post a root cause analysis in the next few days. Thanks for your patience while we worked to resolve this.