Microsoft 365 outage resolved after more than 36 hours
Outlook, Exchange Online, Teams and Copilot failed worldwide from Thursday evening UK time; Microsoft declared the incident fixed early on 14 November. It blamed a problem from an earlier network capacity upgrade that surfaced after a later network change and overloaded servers, not a cyberattack. UK police, courts, GP practices and ISP support lines were among those hit; a full post-incident report is pending.
- Service
- Microsoft 365 (Exchange Online / Outlook)
- Date
- 12 November 2026
- Cause
- Configuration change
- Duration
- 36 hours
- Status
- resolved
- Severity
- critical
- Region
- Global
- Source
- Lowyat.NET ↗
Cite this
Nuffield Consulting, “Microsoft 365 outage resolved after more than 36 hours”, The Daily Tech Wire outage & breach log, 12 Nov 2026. https://techwire.nuffieldconsulting.com/incidents/2026-11-12-microsoft-365-outage/ (retrieved 15 Nov 2026).
This entry summarises public reporting. Please also cite the original source: Lowyat.NET, https://www.lowyat.net/2026/409757/microsoft-365-outage-resolved/.
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