Microsoft investigates Teams and Office outage affecting European Union users

Microsoft is investigating an ongoing service disruption preventing users across the European Union from opening files in its Teams collaboration platform and Office for the web. The incident, which began on June 1, 2026, has impacted file access capabilities for customers in the region as the company works to restore full functionality.

The outage stems from a recent cache configuration change that necessitated a system failover. As traffic from European Union customers began to peak, the transition triggered elevated CPU and memory utilization across affected servers. Microsoft engineering teams are currently working to stabilize the infrastructure and mitigate the performance issues that have prevented users from accessing their documents.

The disruption affects core productivity tools widely used by businesses and organizations throughout the European Union. Users attempting to open files in Teams or Office for the web have encountered errors preventing access to their work. The issue appears isolated to the European Union region, with other global markets reportedly unaffected by the configuration change.

Microsoft has acknowledged the incident and confirmed that engineers are actively addressing the root cause. The company has not yet provided an estimated time for full service restoration. Technical teams are focused on resolving the resource utilization spikes that occurred during the failover process.

The incident highlights the complexity of maintaining large-scale cloud infrastructure during peak usage periods. Cache configuration changes are routine maintenance activities designed to optimize performance, but the unexpected resource demands during the transition have created significant service interruptions for affected users.

As of the latest update, Microsoft continues to monitor the situation closely. The company has not released specific details regarding the number of users impacted or the duration of the outage. Service restoration efforts are ongoing, with engineers working to bring systems back to normal operating parameters.

Users experiencing issues are advised to check Microsoft's official service status page for real-time updates. The company has not indicated whether any data loss has occurred as a result of the disruption, though file access remains the primary concern for affected customers.

The situation remains fluid as Microsoft works through the technical challenges. Further updates are expected as the company progresses through its resolution process. The incident underscores the critical nature of cloud service reliability for businesses dependent on digital collaboration tools.

Microsoft has not yet commented on whether similar configuration changes are scheduled for other regions or if additional preventative measures will be implemented to avoid recurrence. The company's response to the incident will likely be scrutinized by customers and industry observers as service stability remains a priority for enterprise software providers.