Microsoft reports major global outage disrupting Microsoft 365, Outlook and Teams for more than five hours

Microsoft suffered a major global outage on Thursday that disrupted access to widely used productivity and communication services. The report said tens of thousands of users were unable to reach Microsoft 365, Outlook and Teams, with the incident lasting more than five hours.

For many organizations, Microsoft 365 and Outlook act as the backbone for day-to-day communication, while Teams is used for internal meetings and chat. When these services go offline, the impact tends to ripple quickly across corporate and consumer workstreams, particularly where companies run operations and support workflows on Microsoft’s cloud.

The market report framed the outage as global in scope, suggesting it was not confined to a single region, customer, or network carrier. However, the post did not provide a technical explanation for what caused the failure, which systems were impacted first, or whether the incident affected authentication, message delivery, or app front ends in separate waves.

The report also did not specify whether Microsoft issued a formal incident response statement during the five-plus-hour window, or whether customers were notified through service status channels. It was therefore unclear from the public summary how Microsoft communicated scope and restoration timelines while the outage was ongoing.

In the broader context, Microsoft’s cloud services are central to its business and to enterprise IT planning. Microsoft 365, which bundles productivity apps and cloud services, is a key revenue driver for the company, and reliability is a standing expectation among customers that depend on always-on email and collaboration.