Widespread Microsoft 365 Outage Impacts Outlook, Teams and Other Services
Users in the Americas reported connectivity problems with Outlook, Teams, Copilot and other Microsoft 365 services on Nov. 12, prompting Microsoft to investigate the incident under reference EX1550543.
Microsoft said it was investigating a service disruption that began on Nov. 12 and affected Outlook, Teams, Copilot, OneDrive, SharePoint and Exchange Online mailboxes across the Americas. The issue was logged under incident reference EX1550543, allowing administrators to track updates in the Microsoft 365 admin center.
Downdetector recorded more than 130,000 reports from 74 countries and territories, indicating widespread difficulty accessing email, file storage and collaboration tools. Users on public forums described Outlook as unable to connect, long load times for web versions and failures to open inboxes on desktop or mobile devices.
"We're investigating reports of users experiencing issues accessing Exchange Online mailboxes through multiple connection methods in the Americas. More details can be found in the Microsoft 365 admin center under EX1550543," a Microsoft spokesperson said.
Microsoft later added that the problem could affect Microsoft 365 connectivity in any region and that the company was redirecting internet traffic across its global network to mitigate the impact. The firm has not yet disclosed the cause of the outage.
The disruption also extended to Microsoft connectors used by AI tools from OpenAI and Anthropic, according to reports from affected users.