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
Central US Operational
REST API Operational
East US2 Operational
Reports Operational
Central US Operational
Usage & Metering Operational
Central US Operational
Active Directory Operational
East US2 Operational
Canada Central Operational
Dynamics 365 Operational
Canada Central Operational
East US2 Operational
Database Operational
East US2 Operational
Canada Central Operational
Central US Operational
Endpoint Operational
Canada Central Operational
East US2 Operational
Central US Operational
File & Object Operational
Central US Operational
West US2 Operational
West Central US Operational
West US Operational
East US Operational
Canada Central Operational
East US2 Operational
South Central US Operational
North Central US Operational
Canada East Operational
Office 365 Operational
East US2 Operational
Canada Central Operational
Central US Operational
SalesForce Operational
Canada Central Operational
East US2 Operational
Central US Operational
VM & Kubernetes Operational
Canada Central Operational
West US2 Operational
East US2 Operational
West Central US Operational
Central US Operational
West US Operational
East US Operational
North Central US Operational
South Central US Operational
Canada East Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance

Sep 11, 2026

No incidents reported today.

Sep 10, 2026

No incidents reported.

Sep 9, 2026

Weekly Scheduled maintenance
Completed - The scheduled maintenance has been completed.
Sep 9, 08:30 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Sep 9, 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.
Sep 6, 08:01 UTC

Sep 8, 2026

No incidents reported.

Sep 7, 2026

No incidents reported.

Sep 6, 2026

No incidents reported.

Sep 5, 2026

No incidents reported.

Sep 4, 2026

No incidents reported.

Sep 3, 2026

No incidents reported.

Sep 2, 2026

Weekly Scheduled maintenance
Completed - The scheduled maintenance has been completed.
Sep 2, 08:30 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Sep 2, 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.
Aug 30, 08:02 UTC

Sep 1, 2026

No incidents reported.

Aug 31, 2026

No incidents reported.

Aug 30, 2026

No incidents reported.

Aug 29, 2026

No incidents reported.

Aug 28, 2026

No incidents reported.

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