Microsoft investigates outage disrupting Outlook and other 365 services

Microsoft investigated a widespread outage on Nov. 12 that disrupted access to Exchange Online mailboxes and Outlook across the Americas, warning that Microsoft 365 connectivity could be affected in any region. Downdetector reports rose to roughly 120,000–130,000 by early afternoon, though counts varied over time and by report. Users also reported problems with Teams, Copilot, OneDrive and other Microsoft 365 services. Microsoft said elevated load affecting part of its infrastructure across multiple regions contributed to connectivity errors and that it was working to mitigate the impact. The company did not provide an estimated restoration time.