Microsoft Teams and 365 Outage Brings Work to a Halt Across Asia
If you were trying to check your email, join a Teams meeting, or open a shared file early this week in parts of Asia, chances are things just didn’t work the way they were supposed to. A major regional outage hit Microsoft 365 services, leaving thousands of users in Japan and China suddenly locked out of tools many rely on every single day.
The disruption began in the early hours of Thursday, around midnight UTC, which translated to early morning for users in Japan and China. Almost immediately, complaints started surfacing. Outlook wouldn’t load, Teams meetings failed to connect, OneDrive files took forever to open, and even Microsoft’s AI assistant Copilot was affected. For businesses starting their workday, it felt like someone had pulled the plug on modern office life.
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Microsoft later confirmed that the issue wasn’t caused by a cyberattack or a data breach, which was a big relief for many organizations. Instead, it was explained that a routing fault inside Microsoft’s own service infrastructure was to blame. In simple terms, traffic inside Microsoft’s network wasn’t being directed properly, causing otherwise healthy systems to become isolated. As a result, users experienced intermittent login failures, slow performance, and repeated timeouts.
Throughout the morning, Microsoft engineers were said to be working behind the scenes to stabilize things. Traffic was gradually rebalanced across backup and redundant systems, a process that took several hours. During this period, updates were shared through the Microsoft 365 admin center, where IT administrators were advised to monitor incident ID MO1198797 for the latest information.
By late morning in Japan, services were reported to be returning to normal. Microsoft later confirmed that, after extended monitoring, the mitigating actions had successfully resolved the issue for affected users. Importantly, it was also stated that no data loss or security problems were detected during the outage.
Still, the impact was significant. Organizations that depend heavily on cloud-based collaboration felt the disruption immediately. Email communication slowed, internal chats were interrupted, file synchronization stalled, and Copilot-powered workflows were temporarily unusable. For remote teams and enterprises operating across time zones, even a few hours of downtime proved costly and frustrating.
This outage serves as another reminder of just how dependent businesses have become on cloud platforms like Microsoft 365. While systems were restored relatively quickly, the incident highlighted how a single internal misconfiguration can ripple across entire regions. For now, services are back online, but for many users, the morning chaos won’t be forgotten anytime soon.
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