Microsoft Entra ID Outage: How Vantage DX Detected the Issue Before Microsoft Acknowledges the Issue
Outages
On February 25, 2025, at 11:32 AM EST, Martello’s Vantage DX monitoring began alerting on an issue affecting Microsoft Entra ID (Azure AD SSO). While Microsoft had not yet acknowledged the incident, online reddit forums had noted the issue and our Vantage DX proactive monitoring detected disruptions impacting authentication across multiple workloads.
See here the critical warning for Exchange in Vantage DX Monitoring.
Here is the critical warning for OneDrive and SharePoint in Vantage DX.
The above Vantage DX alerts inform the issue is related to the inability to resolve the Microsoft Entra service URL autologon.microsoftazuread-sso.com.
Our monitoring robots flagged an issue with the autologon.microsoftazuread-sso.com endpoint, indicating potential authentication failures. By 11:51 AM EST, alerts became more consistent, confirming a widespread impact on Microsoft Teams and other Microsoft 365 services.
Above is a look at our Vantage DX Proactive Monitoring Teams Dashboard which confirms the issue.
Our proactive monitoring robots flagged an issue with the autologon.microsoftazuread-sso.com endpoint, indicating potential authentication failures. By 11:51 AM EST, alerts became more consistent, confirming a widespread impact on Microsoft Teams and other Microsoft 365 services.
Despite this, Microsoft has not issued an official advisory, nor have they provided updates on X (formerly Twitter) as of 12:22 PM EST.
As of 1:35 PM EST, we are seeing signs that the Microsoft outage is being resolved.
Why Early Detection Matters
For IT teams and Managed Service Providers (MSPs), waiting for Microsoft to acknowledge an issue can mean extended downtime and frustrated users. With Vantage DX, organizations gain:
✔ Proactive Alerts – Detect and respond to issues before they escalate.
✔ End-to-End Visibility – Get real-time insights into Microsoft 365 and Teams performance.
✔ Faster Incident Resolution – Minimize downtime and reduce business disruption.
What’s Next?
As shown above, as of 1:35 PM EST, we are seeing signs that the Microsoft outage is being resolved. However, we continue to monitor the situation closely. If your organization is still experiencing authentication issues, check your Vantage DX dashboards for real-time insights and mitigation strategies.
We’ll update this post with the latest developments, including Microsoft’s official response once available.
Want to stay ahead of Microsoft outages? Learn how Vantage DX can give you the visibility you need to keep users connected.
