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Commvault has a partial disruption.
Commvault has a partial disruption affecting East US2 and France Central and 1 more.
Signal updated 6h ago · Sep 17, 2026, 3:10 PM UTC
Current incident · started Sep 17, 2026, 3:07 PM UTC
Onedrive Backup Discrepancies
We are aware of an issue affecting Microsoft OneDrive backup operations, resulting in an increased number of failed backup items for some customers. Our engineering team is actively investigating the issue and working to determine the root cause. We will continue to provide updates as we learn more.
Affected surface
Components
3 of 34 affected
Official incident text
We are aware of an issue affecting Microsoft OneDrive backup operations, resulting in an increased number of failed backup items for some customers. Our engineering team is actively investigating the issue and working to determine the root cause. We will continue to provide updates as we learn more.
Source text is preserved verbatim and paired with its retrieval time.Last 30 days · Status timeline
What changed
- Identified
Description: We are tracking reports of "Forbidden" errors during Office 365 backups caused by a recent Microsoft Exchange Online behavior change. This affects specific tenants and mailboxes using EWS. Exchange Online jobs may show User Mailboxes reporting a Mailbox Status of: Throttling from Exchange, Failed to process mailbox due to [The request failed. Forbidden] Resolution: Additional information and steps to resolve this can be found here, https://support.commvault.com/Article/Details/KA-191556
- Investigating
We are aware of an issue affecting Microsoft OneDrive backup operations, resulting in an increased number of failed backup items for some customers. Our engineering team is actively investigating the issue and working to determine the root cause. We will continue to provide updates as we learn more.