Outage in Affinity
Authentication Issues with Windows Outlook Desktop App
Minor
June 30, 2026 - Started 20 days ago
Official incident page
Official incident page
Incident Report
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.
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Latest Updates ( sorted recent to last )
IDENTIFIED
10 days ago - at 07/10/2026 08:28PM
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.
IDENTIFIED
20 days ago - at 06/30/2026 04:06PM
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.
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