Wire · operational-macro
Global Microsoft 365 outage lasts 12 hours with logins unavailable
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Fusion42 · 13 November 2026 · Fusion42 review
A global Microsoft 365 outage lasted over twelve hours, affecting services like Outlook, Teams, OneDrive, and SharePoint across 74 countries. The outage was caused by a faulty server update triggering automatic health check failures, leading to widespread login and service unavailability without any cyberattack involved.
This Wire brief sits within Fusion42's coverage of Enterprise Software and Cloud Infrastructure, and 56 sources have reported it between 12 Nov 2026 and 13 Nov 2026.
◆ ◆ The Wire takeaway
Cloud service reliability just suffered a major global test that exposed risky automatic security shutdowns. You must plan immediate failovers to avoid being grounded by a similar cascading failure.
◆ Coverage
56 sources · first reported 12 Nov 2026 · latest 13 Nov 2026
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