This incident follows a pattern of Microsoft 365 service disruptions in 2025, including a major outage in June 2025 that affected Teams and Exchange Online due to routing configuration issues. Microsoft Exchange Online experienced a major global outage on July 10, 2025, preventing millions of users from accessing their mailboxes across multiple platforms. While the primary Exchange Online services were disrupted, other Microsoft 365 services, including Teams, Skype, and OneDrive, appeared to remain functional, suggesting the issue was specific to Exchange Online infrastructure. The current outage represents one of the more significant Exchange Online disruptions, with its extended duration and global scope affecting millions of users worldwide. As of the latest update provided at 9:34 PM GMT+5:30 on July 10, Microsoft has validated that the configuration change has been effective in resolving the impact in targeted infrastructure and has started deploying the expedited configuration change broadly worldwide to all affected infrastructure. According to DownDetector, over 2,100 users reported issues with Outlook services by 9:30 AM ET on July 10, with 62% experiencing login problems, 33% facing server connection errors, and 5% unable to send emails. During the outage, affected users received various error messages, including “Something went wrong,” “invalid licenses,” and authentication failures. Microsoft has emphasized that this is an ongoing investigation, and users should monitor the official Service Health Dashboard for the most current updates on restoration efforts. The outage has affected users across multiple regions, including North America, Europe, Australia, and parts of Asia. The company later determined that a recent service update was unintentionally preventing access for a subset of users, resulting in intermittent service unavailability.
This Cyber News was published on cybersecuritynews.com. Publication date: Thu, 10 Jul 2025 17:25:13 +0000