Ehtisham Qudrat: Microsoft has confirmed that services have fully recovered across Outlook, Teams, Copilot, and other Microsoft 365 applications, ending a massive global outage that lasted over 24 hours. The company has also issued a formal apology for the widespread disruption in a post on X, which began on Thursday, November 12, and affected businesses, governments, and individuals across more than 70 countries.
“We are deeply sorry for the disruption this incident has caused our customers and partners. We know the trust they place in our services and take that responsibility extremely seriously. We are seeing broad recovery and stability across our services.”
Current Recovery Status
Microsoft announced on Saturday, November 14, that services have returned to normal across its all affected productivity suite. Microsoft also extended its email retention window to 48 hours so that messages that are queued during the outage will still be delivered rather than bouncing back.
Root Cause & Investigation
Microsoft attributed the disruption to a technical issue introduced during an earlier network capacity upgrade, which surfaced following a recent network change.
In a statement on X, Microsoft Executive Vice President Charles Lamanna noted that recovery was delayed by "cascading failures" and "thundering herds at our network perimeter" when systems attempted to reconnect.
The company also explicitly ruled out any malicious activity, including cyberattacks, or artificial intelligence agents as causes for the failure.
Lamanna has also committed to releasing a full incident report and is currently reviewing its infrastructure to prevent similar disruptions, stating, “We will publish the post-mortem shortly covering the step-by-step timeline and our many repair items to avoid similar outages in the future.”
Global Impact
The outage logged more than 7.4 million user reports globally as per Downdetector, impacting core tools including Exchange Online, SharePoint Online, Teams, and Defender XDR, According to Reuters. Analysts at Morningstar DBRS estimated global insured losses from the incident to be between $300 million and $500 million.
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