Microsoft works to restore 365 apps following widespread global outage

Microsoft services are gradually recovering after a widespread outage disrupted access to key business and communication tools around the world, leaving tens of thousands of people unable to use email and office software.

The disruption hit the company's Microsoft 365 platform, creating severe difficulties for users attempting to open or send messages in Outlook and participate in Teams calls. Other major tools including Word, Excel, PowerPoint, OneDrive, SharePoint, and the artificial intelligence tool Copilot were also caught up in the incident.

Tracking service Down Detector recorded close to 130,000 issue reports at the height of the disruption, with complaints focusing heavily on unresponsive inboxes and failed connections. While incoming problem reports subsequently declined from their peak, numerous customers continued to face delays and loading errors.

Microsoft acknowledged the incident on social media and through official status notices, stating it had begun examining problems tied to Exchange Online mailboxes. The technology company explained that an unexpected loss of availability across numerous servers created heightened demand on the surviving equipment, triggering wider connection failures.

The company stated that the issue stemmed from machines failing during routine automated system checks rather than an external surge in customer traffic. In response, Microsoft halted software deployments and setting adjustments while engineers reviewed recent modifications. Technicians identified configuration updates as a possible root factor and considered rolling them back to speed up recovery efforts.

To restore functionality, Microsoft validated a modified health monitoring approach on a small test group of servers before deploying the remedy across its broader fleet. Teams worked to manually restart and verify the unresponsive hardware, alongside setting up automated tools to detect and reboot halted systems. Earlier in the response, the company noted it had resolved isolated Teams issues across North America, though intermittent complaints persisted.

Specialists noted that such cloud disruptions frequently escalate because traffic automatically diverts to fewer operational units, quickly overwhelming remaining capacity. The widespread downtime once again highlighted the operational risks confronting businesses that rely entirely on centralized cloud ecosystems, prompting experts to emphasize the need for rigorous pre-deployment testing and independent secondary communication channels.