What’s Happening with Outlook? Due to heavy disruption in Microsoft Outlook, email and calendar services are being interrupted worldwide since July 10, 2025. Millions of users are affected on the platform like Outlook.com, Outlook Mobile (iOS / Android) and Outlook Desktop (Windows / Mac). Major problems include: Outlook outage frustrates users with 'Service Unavailable' errors worldwide Access related problems: User reports that despite the active membership, the mailboxes are locked or "invalid license" error. Performance Problems: Unable to download / receive slow email delivery, inability to send / receive messages, or attachments. Extensive effect: Related Microsoft 365 Services, such as Exchange Online and Microsoft Teams Calendar, are also affected. This interruption is global, and its reports are increasing rapidly in cities like New York, London, Chicago and Manchester. Over 300 complaints per minute have been logged on DownDetector, which reflects the severi...
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