Authentication Issues with Windows Outlook Desktop App

Summary

Authentication Issues with Windows Outlook Desktop App

This issue has been resolved now. Customers who were impacted will need to contact Affinity support at support@affinity.co for config change instructions.

• Started

  Jun 30, 2026 · 9:06 AM

• Resolved

  Jul 23, 2026 · 8:00 AM

• Duration

  22d 22h 54m

• Severity

  Minor

• ◆

  Identified

  Jun 30 · 9:06 AM Affinity

  Some users on Windows Outlook Desktop App are unable to complete SSO login to the Affinity Outlook Add-in. This is due to a recent change on Microsoft's end affecting how Outlook on Windows handles authentication redirects. Mac Outlook is unaffected. As a workaround, users can access Affinity via the web application.

• ◆

  Identified

  Jul 10 · 1:28 PM Affinity

  We are investigating an update to the Affinity platform that will work around the issue caused by Microsoft's recent change and restore SSO login behavior for Windows Outlook Desktop App users. Mac Outlook and the Affinity web application are unaffected and can be used as a workaround in the interim.

• ✓

  Resolved

  Jul 23 · 8:03 AM Affinity

  This issue has been resolved now. Customers who were impacted will need to contact Affinity support at support@affinity.co for config change instructions.