Why is Microsoft 365 not working and which services and apps are down?
Microsoft 365 services faced an outage on Thursday. Users reported issues with Outlook, Teams, Microsoft Store, Microsoft Defender, and Microsoft Purview. Many received a ‘451 4.3.2 Temporary server error’ when trying to send or receive emails. Microsoft confirmed it was investigating the problem.
Microsoft 365 outage affected regions
The Microsoft 365 outage on Thursday primarily impacted users in North America, but reports also came from other regions. Microsoft identified a portion of its service infrastructure in North America as the main cause. Users in several countries reported problems accessing Outlook, Teams, Microsoft Store, Microsoft Defender, and Microsoft Purview. The outage caused delays in email delivery, failed logins, and temporary server errors. Microsoft is working to restore normal service and rebalance traffic across affected areas.
List of affected regions:
- United States
- Canada
- Mexico
- United Kingdom
- Germany
- France
- Australia
- India
- Japan
- Brazil
Microsoft 365 outage affected US cities
Downdetector published an outage map showing that several major cities were impacted by the Microsoft 365 outage. Users in these locations reported issues with Outlook, Teams, Microsoft Store, Microsoft Defender, and Microsoft Purview. The outage caused email delays, failed logins, and temporary server errors, affecting both individual users and businesses. Microsoft is working to restore services and monitor the situation in all affected areas.
Map showing affected US cities during the Microsoft 365 outage, including Los Angeles, New York, Chicago, Dallas, Houston, San Francisco, and Seattle, where users reported issues with Outlook, Teams, and other services. Pic Credit: Downdetector
List of affected cities in US:
- Los Angeles
- Minneapolis
- Phoenix
- Dallas
- Houston
- San Francisco
- Atlanta
- Tampa
- Washington
- New York
- Boston
- Chicago
- Detroit
- Seattle
Microsoft 365 outage latest status update
Microsoft has provided an updated status on the ongoing Microsoft 365 outage. The company said the underlying cause has been fixed, but some Microsoft 365 apps and services still face ongoing impact. Microsoft said teams continue to monitor availability and functionality across all services. The update noted that service functionality is increasing and mitigation actions are in progress to restore full service. Microsoft also pointed users to check the Microsoft 365 Admin Center and status dashboards for the latest details on recovery and any remaining issues affecting apps like Outlook, Teams, Defender, and Purview.
Microsoft 365 outage details
Microsoft said, “We’re investigating a potential issue impacting multiple Microsoft 365 services, including Outlook, Microsoft Defender and Microsoft Purview. Further information can be found in the admin center under MO1221364.”
At the time of writing, over 11,000 people faced problems with Outlook. Over 14,000 users reported issues with Microsoft 365 overall. Downdetector tracked complaints, with most users unable to receive messages.
Microsoft 365 outage cause
Microsoft identified a portion of service infrastructure in North America that was not processing traffic correctly. The company said it was working to restore the infrastructure and rebalance traffic.
The statement read: “We’ve identified a portion of service infrastructure in North America that is not processing traffic as expected. We’re working to restore the infrastructure to a healthy state to achieve recovery. More information can be found at https://status.cloud.microsoft
or under MO1221364 if accessible.”
Microsoft 365 services and apps affected
The outage impacted multiple Microsoft services, including:
- Microsoft Outlook
- Microsoft Teams
- Microsoft Store
- Microsoft Defender
- Microsoft Purview
- Microsoft Azure
User reactions
Many users shared complaints online. One wrote, “I can’t do other work because I can’t get my 2-factor authentication email.” Another said, “451 4.3.2 Temporary server error. Please try again later ATTR2.”
Users also reported issues on social media platforms like X, saying emails were delayed and services were slow or inaccessible.
Temporary fixes for users
The ‘451 4.3.2 Temporary server error’ indicates server-side issues. Users are advised to wait and try again later. IT administrators can check server health, DNS, diagnostics, and connectors. Microsoft said the problem is on its side, and users cannot fix it individually.
Microsoft response and status updates
Microsoft confirmed that the infrastructure was restored to a “healthy state” but required further load balancing. Traffic is being redirected as engineers apply fixes. Some services like Azure are gradually coming back, while Teams and Store are still experiencing intermittent problems.
Future updates
Microsoft has not provided a specific Estimated Time of Resolution (ETR). Users can check the Microsoft 365 Admin Center for service health updates. Partial service restoration may occur before full resolution.
FAQs
Q1: How long will Microsoft 365 be down after this outage?
The company has not given a specific time. Updates will be posted on the Microsoft 365 Admin Center as engineers continue to restore services.
Q2: Which regions were affected by the Microsoft 365 outage?
The outage mainly affected North America, including the US, Canada, and Mexico, but users in the UK, Germany, France, Australia, India, Japan, and Brazil also reported issues.
