Microsoft has confirmed the issue is fully resolved now.
What went wrong and why?
An inadvertent tenant configuration change within Azure Front Door (AFD) triggered a widespread service disruption affecting both Microsoft services and customer applications dependent on AFD for global content delivery. The change introduced an invalid or inconsistent configuration state that caused a significant number of AFD nodes to fail to load properly, leading to increased latencies, timeouts, and connection errors for downstream services.
As unhealthy nodes dropped out of the global pool, traffic distribution across healthy nodes became imbalanced, amplifying the impact and causing intermittent availability even for regions that were partially healthy. We immediately blocked all further configuration changes to prevent additional propagation of the faulty state and began deploying a ‘last known good’ configuration across the global fleet. Recovery required reloading configurations across a large number of nodes and rebalancing traffic gradually to avoid overload conditions as nodes returned to service. This deliberate, phased recovery was necessary to stabilize the system while restoring scale and ensuring no recurrence of the issue.
The trigger was traced to a faulty tenant configuration deployment process. Our protection mechanisms, to validate and block any erroneous deployments, failed due to a software defect which allowed the deployment to bypass safety validations. Safeguards have since been reviewed and additional validation and rollback controls have been immediately implemented to prevent similar issues in the future.
Gianfranco Montesanto
On October 29th, 2025, at 12:00 PM EST, we encountered an outage with Microsoft Azure that impacted Sparkrock 365. Microsoft is actively working to resolve the issue, and we will inform you promptly once the service is restored.
We appreciate your understanding during this matter, and should you experience any persistent issues, please do not hesitate to reach out to us.
Azure's Status Page: https://azure.status.microsoft/en-us/status
Microsoft's Communication
User impact: Users may be unable to access the Microsoft 365 admin center and see delays when accessing other Microsoft 365 services. Users are also seeing issues with add-ins and network connectivity in Outlook.
Current status: We are reviewing reports of an issue impacting Microsoft Azure and Microsoft 365 services, including impact to the Microsoft 365 admin center and other services, including but not limited to those described in the more info section of this communication. We are reviewing corresponding service telemetry to isolate the cause of the issue and determine our next troubleshooting steps.
Scope of impact: Any users attempting to access Microsoft 365 services may be impacted.