Microsoft 365 Services Disrupted Globally; Outlook, Teams, and Copilot Users Affected
On Thursday, November 12, 2026, Microsoft faced a major global technical issue. The disruption made it difficult for thousands of users to access Outlook and other Microsoft 365 services. Problems related to internet connectivity and logging in persisted for several hours across many countries.
Microsoft attributed the disruption to an increased load on its infrastructure. The company stated that its technical team was working continuously to restore services.
Global Impact on Microsoft 365 Services
The outage affected several of Microsoft’s popular services, including Outlook, Microsoft Teams, and the AI-powered Copilot. Many users reported difficulties accessing their email accounts, sending and receiving emails, and connecting to applications used for office-related tasks.
According to Downdetector, a platform that tracks service outages, the issue spread across 74 countries and regions worldwide within just one hour. A map shared by Downdetector on social media indicated that the impact was felt in the United States, as well as in parts of Europe, Asia, and Africa.
Microsoft Cites Increased Infrastructure Load as the Cause
Initially, Microsoft began investigating reports of service disruptions from users in the United States. However, the company later clarified that the Microsoft 365 connectivity issue could potentially affect users in any region across the globe. According to information shared on the social media platform X, an increased load on the company's infrastructure across several regions was the likely cause of the connectivity issues.
Microsoft stated that it is taking various measures to minimize the impact on customers and restore the affected services.
Disruptions to Outlook Service for Thousands of Users
Outlook users appear to have been the most significantly affected by this global outage.Data from Downdetector indicates that, following 1:00 PM Eastern Time (US) on Thursday, approximately 130,000 users reported issues with Outlook.
By 6:00 PM, this number had decreased to around 37,000; however, thousands of users continued to face difficulties accessing Outlook, Teams, and Copilot.
Microsoft’s Efforts to Restore Services
Microsoft implemented several technical measures to address the service disruptions. The company halted new infrastructure deployments, rerouted excess traffic from affected servers, and restarted the servers that were experiencing issues. Nevertheless, it took several hours for services to be fully restored even after these interventions.
In a subsequent update, Microsoft noted that limited improvements were being observed as efforts continued to reroute user traffic away from the affected infrastructure.
The cmpany further explained that as service capacity is restored and applications reconnect, users should gradually see services return to normal.
What Can Users Expect Moving Forward?
This incident has once again underscored the critical importance of Microsoft’s cloud infrastructure for businesses, professionals, and everyday users alike. Services such as Outlook, Teams, and Copilot are widely used for email communication, online meetings, office collaboration, and AI-driven tasks.
Although Microsoft indicated signs of improvement, the company’s latest update did not provide official confirmation that all services had been fully restored.
Users experiencing issues are advised to allow time for their applications to reconnect while Microsoft works on restoring the services.
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