Fivetran: SharePoint and Microsoft Lists connections are failing with error "Authentication failed: The client secret or certificate has expired"

Update timeline

1. identified Apr 28, 2026, 09:50 AM UTC

   The issue has been identified and we are working to resolve it.

2. identified Apr 28, 2026, 09:51 AM UTC

   Fivetran's OAuth app secret key has expired, and the team is working on creating new secret key credentials to fix the issue.

3. monitoring Apr 28, 2026, 09:52 AM UTC

   A new secret key credential has been created to resolve the issue. Syncs are now recovering, and we are monitoring the results.

4. monitoring Apr 28, 2026, 10:26 AM UTC

   We have updated all the regions with the new secret keys and will continue to monitor the connections.

5. resolved Apr 28, 2026, 02:57 PM UTC

   This incident has been resolved. We have observed that instance rates are returning to normal levels and affected connectors are syncing successfully. Incident Summary Description: We identified an issue for SharePoint and Microsoft Lists connections which resulted in syncs failing with a "Authentication failed: The client secret or certificate has expired" error. Timeline: This issue began on 2026-04-27 at 22:20:00 UTC and was resolved on 2026-04-28 at 09:30:00 UTC Cause: The issue occurred due to Microsoft OAuth app credentials expiration.Due to this internal workflows failed to rotate the secret keys. Resolution: A fix has been implemented to update these secrets.