Microsoft 365 Outage Disrupts Teams and Exchange Online Services

REDMOND, Wash. — Microsoft is addressing a significant outage affecting its Microsoft 365 services, including Microsoft Teams and Exchange Online. The disruption began on Wednesday, October 8, 2025, and has left users worldwide struggling to access crucial applications and features.

Users reported authentication problems and service access issues. Microsoft confirmed the incident on its Service Health Dashboard, marking it as a critical service issue with widespread user impact. The company indicated that its engineering teams are actively working to resolve the problem.

In a recent service alert, Microsoft stated, “Some users attempting to access other Microsoft 365 services may be unable to authenticate and access the services. Additionally, users may not receive Multi-Factor Authentication (MFA) messages when attempting to sign in.” This indicates that the outage is impacting essential security processes as well.

Affected individuals may see error messages such as, “We are sorry, something went wrong. Please try refreshing the page in a few minutes.” Microsoft is providing regular updates on its official service page to keep users informed of the situation.

As part of its mitigation efforts, Microsoft engineers have been working to rebalance its dependent service infrastructure. This action is intended to alleviate the issues caused by a potential directory operations failure identified within the service’s backend.

By early morning on October 9, 2025, Microsoft reported that its rebalancing efforts had begun yielding positive results, with many users regaining access to the affected services. However, the company continues to monitor the situation closely to ensure stability.

This outage is not the first for Microsoft this year. Previous incidents have raised concerns regarding the reliability of its cloud services, which support millions of organizations worldwide. In the past, Microsoft has addressed several outages affecting large groups of users.

In January 2025, the company mitigated an earlier outage impacting Multi-Factor Authentication. More recently, in July 2025, administrators faced difficulties accessing the Microsoft 365 admin center due to another service disruption. As users continue to depend on these platforms for daily operations, the significance of service reliability remains paramount.