Microsoft Exchange outage disrupts Outlook, Teams, and Microsoft 365 for over 100,000 users

Microsoft 365, including Outlook, Teams, and Copilot, experienced a major outage on Thursday, with over 100,000 users reporting access issues on DownDetector, though Microsoft attributes the problem to its backend cloud tool, Microsoft Exchange. Exchange is the server that stores data, manages mail flow, syncs information to Outlook, and enforces security policies, making it the backend while Outlook serves as the frontend. For users, the distinction is irrelevant, as the outage blocks access to email, calendars, and messages. Microsoft has posted updates on X but has not responded to Mashable's request for comment as of this writing.