Intermittent SharePoint item download failures in Veeam Data Cloud for Microsoft 365

Update timeline

1. identified Mar 20, 2026, 04:09 PM UTC

   We have identified an issue with the Microsoft Sharepoint & OneDrive API resulting in some restored files to cause errors when opened with Microsoft office. We are currently working on mitigating this issue and are doing a joint investigation with Microsoft.

2. monitoring Mar 22, 2026, 05:02 PM UTC

   As of 12:30 UTC, our engineering team has deployed a fix for the issue impacting the Microsoft SharePoint & OneDrive API. We are no longer observing new errors. However, some customer files that were backed up in recent weeks may continue to exhibit issues during restore until remediation is completed. Our Veeam Data Cloud engineering team is now working to identify and reprocess any files that were impacted during this period.

3. monitoring Mar 25, 2026, 06:01 PM UTC

   As of March 25, we have deployed an update globally and are seeing stable operation. While no new instances of the error are being observed, we are continuing follow-up work to ensure all previously impacted scenarios are fully resolved. An update on this work will be provided as soon as possible.

4. monitoring Apr 03, 2026, 02:57 PM UTC

   As of March 25, we deployed an update globally and continue to see stable service operation. At this time, we are not observing any new instances of this issue. Our engineering team continues follow-up work with Microsoft and internal engineering efforts to ensure all previously impacted scenarios are fully addressed and to drive a permanent resolution. We expect to have additional updates in the next few days and will share another update as soon as we have more information.

5. resolved Apr 20, 2026, 04:07 PM UTC

   We have not observed any recurrence of this issue since the March 25 update. We are closing this incident and will continue working with Microsoft on any remaining items.