Wire · technology
One outage, millions affected. What went wrong at Microsoft?
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Fusion42 · 13 November 2026 · Fusion42 review
A major outage in Microsoft Exchange Online and related Microsoft 365 services beginning November 12 caused widespread disruption globally, affecting email, calendars, Teams meetings, and AI connectors. Microsoft addressed server overload and configuration issues but the root cause remains unconfirmed, impacting businesses and public institutions worldwide.
This Wire brief sits within Fusion42's coverage of Enterprise Software, and 8 sources have reported it.
◆ ◆ The Wire takeaway
A single failure in Microsoft’s cloud email backend now proves that relying on one provider's platform can halt your core business tools worldwide. You must develop backup workflows or alternative channels this week to avoid a similar outage crippling your operations.
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8 sources · 13 Nov 2026
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