The ongoing Microsoft 365 outage is resolving after nearly 24 hours. The company said the underlying issue has been fixed and it is seeing "broad recovery and stability" across its services as it works to restore access to customers.
The Microsoft 365 downtime started at approximately 1 p.m. Eastern Time on Thursday. Customers could not access their Outlook email or use some features in Teams and Copilot. Exchange accounts in Apple Mail were also affected. Most calling, meeting, and messaging functions stayed online, but some users ran into errors scheduling meetings or adding calendar entries.
Businesses, educational institutions, and governments worldwide were impacted by the outage.
Microsoft apologized for the outage and said it was unrelated to a cyberattack or AI agents. It was caused by an issue introduced in an earlier network capacity upgrade. Microsoft said it will give a full incident report after completing a review.
We are deeply sorry for the disruption this incident has caused our customers and partners. We know the trust they place in our services and take that responsibility extremely seriously. We are seeing broad recovery and stability across our services.
This was a technical issue not related to cyber or AI / agents. The incident was introduced by an issue during an earlier network capacity upgrade that surfaced following a recent network change. We have addressed the underlying issue and continue to restore service to remaining customers and regions.
Given the scale of demand, we restored services gradually, validating stability at each stage. While this took longer, it helped ensure a stable restoration.
We will provide a full post-incident report once our review is complete.
Just over two weeks ago, Microsoft announced plans to eliminate thousands of jobs. The company offered voluntary buyouts to 60,000 people, or a quarter of its global workforce, presumably to cut costs while its AI spending grows.
Microsoft's Service Health Status page still says some services may be unavailable at the current time.
