How one network change disrupted Microsoft Outlook, Teams & AI tools that rely on them
A major Microsoft network outage disrupted services like Outlook and Teams for over 24 hours across 74 countries. The company confirmed the issue was caused by technical configuration errors rather than a cyberattack or AI failure.
Why it matters
The incident demonstrates the extreme global dependency on centralized cloud infrastructure and the cascading impact of minor network changes.
A financial firm in Taiwan went back to the fax machine to confirm trades. At Europe’s Euronext exchange, email was disrupted. Shipping group Maersk warned customers that updates could take longer. The three businesses were among thousands of those caught up in a Microsoft outage that began on November 12 and took more than a day to ease. One of the world’s largest software companies had changed something in its network. A trading desk ended up reaching for a fax.Microsoft traced the outage to a problem introduced during an earlier expansion of its network capacity. The problem surfaced when the company made a subsequent network change. Microsoft ruled out a cyberattack and said AI played no role in causing the outage.
Headlinne story · 8 newsrooms
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