Microsoft 365 Global Outage Disrupts Outlook, Teams; Hong Kong Workers Affected
HK01 · 5 SOURCESabout 1 hour ago2 MIN
Summary
Microsoft encountered a major global service disruption on November 12-13, 2026, affecting its Microsoft 365 cloud platform. The incident began at approximately 1pm US Eastern time on November 12 (2am Hong Kong time on November 13) and impacted core productivity tools including Outlook email, Teams video conferencing, and Copilot AI functionality .
Key Points
- Downdetector recorded over 130,000 Outlook outage reports at peak globally, dropping to around 50,000-60,000 by early morning Hong Kong time
- Affected services included Exchange Online (Outlook), Teams, OneDrive, SharePoint Online, and Copilot AI functionality
- Microsoft confirmed multiple servers unexpectedly went offline and failed automated health checks, overloading remaining infrastructure and triggering cascading failures
- Microsoft halted all system deployments and redirected traffic to unaffected infrastructure; no evidence of cyber attack has been found
- AI companies OpenAI and Anthropic, which use Microsoft connectors, also experienced connection issues during the outage
Why It Matters
Hong Kong's business community relies heavily on Microsoft 365 services for daily operations, making this outage particularly disruptive during peak Friday morning working hours . The Hong Kong Stock Exchange confirmed its email services were affected by the global disruption, though all markets continued operating normally . With many local companies using Outlook for correspondence and Teams for internal and client meetings, workers face potential delays and missed video conferences as the workday begins, underscoring the vulnerability of cloud-dependent infrastructure when major technology platforms experience service disruptions.
Hong Kong's business community relies heavily on Microsoft 365 services for daily operations, making this outage particularly disruptive during peak Friday morning working hours . The Hong Kong Stock Exchange confirmed its email services were affected by the global disruption, though all markets continued operating normally . With many local companies using Outlook for correspondence and Teams for internal and client meetings, workers face potential delays and missed video conferences as the workday begins, underscoring the vulnerability of cloud-dependent infrastructure when major technology platforms experience service disruptions.