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Rows of server racks with blue indicator lights in a data centre aisle

Microsoft 365 outage: Exchange Online disruption of 12-13 November 2026

A Microsoft 365 outage from 12 November 2026 disrupted Exchange Online mailboxes. Microsoft blames a network capacity upgrade, not a cyber attack. Here is what is confirmed.

MTMainstream Tech·Nov 13, 2026·4 min read