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 - 12:35 UTC
Usage & Metering Operational
Frankfurt Operational
Reports Operational
Frankfurt Operational
REST API Operational
Frankfurt Operational
Web Portal Operational
Frankfurt Operational
Office 365 Operational
Frankfurt Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance

Sep 19, 2026

No incidents reported today.

Sep 18, 2026

No incidents reported.

Sep 17, 2026

Scheduled Maintenance Notice
Completed - The scheduled maintenance has been completed.
Sep 17, 09:10 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Sep 17, 07:10 UTC
Scheduled - We will be performing scheduled maintenance on September 17 to enhance the reliability and performance of our AWS network infrastructure. During this maintenance window, customers may experience brief periods of increased latency or intermittent connectivity to some services.

Our teams will work to minimize any impact, and we do not anticipate extended service interruptions. We will provide any updates throughout the maintenance window and notify customers once the work has been completed.
Sep 17, 07:06 UTC

Sep 16, 2026

Weekly Scheduled maintenance
Completed - The scheduled maintenance has been completed.
Sep 16, 08:30 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Sep 16, 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 13, 08:01 UTC

Sep 15, 2026

No incidents reported.

Sep 14, 2026

No incidents reported.

Sep 13, 2026

No incidents reported.

Sep 12, 2026

No incidents reported.

Sep 11, 2026

No incidents reported.

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, 08:02 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.

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