Microsoft tests fix for latest hours-long Outlook outage
Microsoft says it's testing a fix for the widespread Outlook issues that have led to email delays and failures.
Microsoft tested a fix for a recent multi-hour outage affecting Outlook users across its Exchange Online service, the cloud-hosted platform for business email, calendar, contacts, and tasks. In a statement on X, Microsoft confirmed the issue stemmed from an "authentication component" and was currently being tested on a portion of its infrastructure to determine if it resolved the problem. If successful, Microsoft plans to roll out the solution more broadly.
The outage began around 11:30 AM ET on Monday, with user reports pouring in via crowdsourced detection websites like Downdetector. By 2 PM ET, the site was recording over 5,000 reports of users experiencing email delays, failures in sending or receiving messages, authentication errors, and other issues.
Microsoft acknowledged that the authentication component was impacting services beyond Exchange, extending the disruption to other platforms. As email remains a cornerstone of business communication, this prolonged outage accentuates the critical role Outlook and Exchange play in modern business operations.
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