Exchange Online Backup Failures (Forbidden Errors)
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
Jun 22, 2026 - 12:14 UTC
Web Portal Operational
UK South Operational
REST API Operational
East US2 Operational
Reports Operational
UK South Operational
Usage & Metering Operational
UK South Operational
Active Directory Operational
UK South Operational
Dynamics 365 Operational
UK South Operational
Database Operational
UK South Operational
Endpoint Operational
UK South Operational
File & Object Operational
UK South Operational
UK West Operational
Office 365 Operational
UK South Operational
Google Workspace Operational
Europe West 2 Operational
SalesForce Operational
UK South Operational
VM & Kubernetes Operational
UK South Operational
UK West Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance

Aug 2, 2026

No incidents reported today.

Aug 1, 2026

No incidents reported.

Jul 31, 2026

No incidents reported.

Jul 30, 2026

No incidents reported.

Jul 29, 2026

Weekly Scheduled maintenance
Completed - The scheduled maintenance has been completed.
Jul 29, 04:30 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 29, 03:00 UTC
Scheduled - We will be doing quick maintenance to ensure the best experience for our customers.We will be back shortly and operations that were in progress will immediately resume.
Jul 26, 08:01 UTC

Jul 28, 2026

No incidents reported.

Jul 27, 2026

No incidents reported.

Jul 26, 2026

No incidents reported.

Jul 25, 2026

No incidents reported.

Jul 24, 2026

No incidents reported.

Jul 23, 2026

No incidents reported.

Jul 22, 2026

Weekly Scheduled maintenance
Completed - The scheduled maintenance has been completed.
Jul 22, 04:30 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 22, 03:00 UTC
Scheduled - We will be doing quick maintenance to ensure the best experience for our customers.We will be back shortly and operations that were in progress will immediately resume.
Jul 19, 08:02 UTC

Jul 21, 2026

No incidents reported.

Jul 20, 2026

No incidents reported.

Jul 19, 2026

Degraded backup performance
Resolved - We have continued to closely monitor operations throughout the weekend and can confirm that system performance has remained stable. Job processing has returned to and is continuing at normal levels, with no further issues observed. We will maintain enhanced monitoring as a precaution, but at this time the incident is considered resolved.
Jul 19, 13:14 UTC
Monitoring - We have deployed corrective fixes to address the issue affecting certain VM and OneDrive backups and are actively monitoring system performance to ensure service stability and continued improvement. While backup performance is recovering, some customers may still experience intermittent delays or longer-than-normal backup durations as the environment stabilizes.

Our teams remain closely engaged and are monitoring the effectiveness of these changes while continuing to validate system health across impacted services. We appreciate your patience and understanding as we work to fully restore normal service levels and will provide additional updates as needed.
Jul 17, 15:10 UTC
Update - We have identified an issue affecting certain VM and OneDrive backups and continue to actively work with our engineering teams on mitigation efforts. Customers may still experience degraded backup performance and longer-than-normal backup durations while we address the identified issue and work toward restoring normal service levels.

Our teams remain engaged and are monitoring the situation closely as mitigation activities continue. We appreciate your patience and understanding and will provide additional updates as more information becomes available.
Jul 17, 02:36 UTC
Update - We have identified an issue affecting certain VM and Onedrive backups. This issue is impacting backup performance and we are actively working with our engineering teams to restore normal service levels as quickly as possible. Customers may continue to experience longer-than-normal backup durations while mitigation efforts are underway.

We appreciate your patience and understanding as we work to fully resolve this issue. We will continue to provide updates as more information becomes available.
Jul 16, 17:01 UTC
Update - We have identified the issue, and our engineering teams are implementing corrective measures to restore full performance.
We appreciate your patience and understanding as we work toward complete resolution. Additional updates will be shared as soon as new information becomes available.
Jul 16, 10:00 UTC
Identified - We have identified the issue impacting backup performance and are actively working with our engineering teams to restore normal service levels as quickly as possible. Customers may continue to experience longer-than-normal backup durations while mitigation efforts are underway.

We appreciate your patience and understanding as we work to fully resolve this issue. We will continue to provide updates as more information becomes available.
Jul 15, 21:20 UTC
Investigating - We are currently investigating a performance issue that is impacting job execution, resulting in some jobs remaining in a waiting state. Our team is actively working to resolve the issue and restore normal operations as soon as possible. We appreciate your patience during this time.
Jul 15, 13:59 UTC
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