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 - 12:38 UTC
Web Portal Operational
Australia East Operational
East US2 Operational
REST API Operational
East US2 Operational
Reports Operational
Australia East Operational
East US2 Operational
Usage & Metering Operational
Australia East Operational
East US 2 Operational
Active Directory Operational
Australia East Operational
East US2 Operational
Canada Central Operational
Database Operational
Canada Central Operational
East US2 Operational
Australia East Operational
Dynamics 365 Operational
Canada Central Operational
East US2 Operational
Australia East Operational
Endpoint Operational
Australia East Operational
East US2 Operational
Canada Central Operational
File & Object Operational
North Central US Operational
Central US Operational
East US Operational
West US2 Operational
West Central US Operational
South Central US Operational
West US Operational
Canada Central Operational
Australia East Operational
Canada East Operational
East US2 Operational
Office 365 Operational
Australia East Operational
Canada Central Operational
East US2 Operational
SalesForce Operational
Canada Central Operational
Australia East Operational
East US2 Operational
VM & Kubernetes Operational
East US Operational
Canada East Operational
Central US Operational
West US Operational
East US2 Operational
North Central US Operational
West Central US Operational
Australia East Operational
West US2 Operational
Canada Central Operational
South Central US 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, 08:30 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 29, 07:00 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, 08:30 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 22, 07:00 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

No incidents reported.

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