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1h ago

Microsoft 365 Outage Disrupts Outlook and Core Cloud Services

Microsoft says multiple servers became unexpectedly unavailable, creating an elevated load that engineers are addressing by redistributing traffic and restarting affected systems.

Reportan fallas en el servicio Microsoft 365 a nivel mundial
La empresa investiga una falla que afecta el acceso a Outlook, Microsoft 365 y Copilot, mientras miles de usuarios reportan problemas para utilizar los servicios.
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Los servicios de Microsoft caen en todo el mundo

Overview

  • The disruption began near midday on Thursday, November 12, 2026, with large spikes of user reports and Downdetector alerts as customers could not access Exchange Online mailboxes.
  • Microsoft logged the incident under EX1550543 and MO1550821 and said the problem started when several servers went offline, forcing remaining infrastructure to absorb extra load.
  • Engineers are mitigating the issue by redistributing connection traffic, pausing deployments, and restarting the servers that failed, and some components showed partial recovery such as a Teams fix in North America.
  • The outage affected multiple Microsoft 365 services beyond Outlook, including Teams, SharePoint Online, Copilot and Defender XDR, and left many office workers unable to send or receive email during business hours.
  • Administrators are directed to the Microsoft 365 admin center and status.cloud.microsoft for updates, and third‑party monitors like Downdetector show user‑reported spikes that do not equal confirmed account‑level outage counts.