Fivetran incident
Fivetran: SharePoint and Microsoft Lists connections are failing with error "Authentication failed: The client secret or certificate has expired"
Fivetran experienced a major incident on April 28, 2026 affecting Microsoft Lists and SharePoint, lasting 13h 46m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- identified Apr 28, 2026, 09:50 AM UTC
The issue has been identified and we are working to resolve it.
- 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.
- 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.
- 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.
- 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.