What we know about the global Microsoft outage
Microsoft has said the outage was not caused by a cyber-security incident, but efforts to fix the issues have so far been largely unsuccessful.
A global outage affecting Microsoft 365 services began on November 12, starting with Exchange Online failures that impacted Outlook, Teams, SharePoint, Copilot, and various security tools. Computerworld reports the outage began at 16:17 UTC, while The Register notes it started around 18:00 UTC. The disruption caused issues for users attempting to access mailboxes via Outlook desktop, web, or mobile clients, and Downdetector recorded over 130,000 Outlook problem reports at its peak.
In Hong Kong, the outage disrupted work for employees in the financial sector, including staff at Goldman Sachs and Nomura, according to SCMP Business.
Microsoft initially attributed the incident to a problem causing servers to fail automated health checks. Dev.to reports that a core process for establishing secure connections became overwhelmed, and that rolling back a recent network configuration change was among the recovery actions taken. While Microsoft stated it found no indication of malicious activity or a cyber-security incident, BBC Technology reports that efforts to fix the issues have been largely unsuccessful. Computerworld adds that Microsoft's latest fixes were "not taking as expected."
Brief written by urgent.news from BBC Technology, Computerworld, The Register, Dev.to, SCMP Business — 5 reports on this story. Machine-written — may contain errors; check the original before relying on it.
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