Microsoft Exchange Online Outage Disrupts Email Services in North America and Germany

On June 2, 2026, Microsoft acknowledged a significant service outage affecting Exchange Online users in North America and Germany. The incident, tracked as EX1331830, has resulted in email delays and failures, with some messages remaining undelivered for over an hour. Users are encountering SMTP deferral errors and abrupt connection closures. Microsoft classified the outage as a critical incident due to its substantial impact on business communications. The company is currently investigating the root cause and reviewing user reports to assess the situation. This is not the first incident affecting Exchange Online, as Microsoft has dealt with similar outages in recent months. The ongoing issues are causing considerable disruption for businesses relying on the service for email communication.

Key Points: • Microsoft Exchange Online is experiencing a critical outage affecting North America and Germany. • Users are facing significant delays and failures in sending and receiving emails. • The outage has been classified as a critical incident due to its impact on business operations.