Microsoft Exchange Online outage causes email delays, failures
Microsoft is addressing a widespread service outage affecting Exchange Online customers in North America and Germany, causing email delays and failures. The issue, tracked under incident ID EX101010, impacts the mail flow pipeline, preventing timely delivery of messages. Microsoft has identified the problem and is deploying a fix, with updates available on the Microsoft 365 admin center. The outage began around 17:02 UTC on June 2, 2026, according to BleepingComputer. Affected users may experience delays of several hours or complete delivery failures. Microsoft recommends checking the service health dashboard for the latest status.
// why it matters
Email delays can disrupt developer workflows and critical communications.