Overview
- Microsoft 365 products including Outlook, Teams and Copilot experienced wide outages beginning Thursday, with Downdetector showing more than 130,000 reports for Outlook at the height of the incident.
- The company says a portion of its cloud infrastructure faced an unusually high load that likely caused connectivity errors and has been working on mitigation steps and traffic rerouting.
- Microsoft reported partial, phased restorations by Friday morning while warning that some mitigation measures did not produce expected results and alternative fixes are being tested.
- The disruption affected enterprise and government communications, including New Zealand’s diplomatic email system, airline customer service operations and public agencies in multiple countries.
- The outage also hit integrations such as Copilot, OneDrive and links with OpenAI and Anthropic and comes after a recent CISA notice about an Outlook flaw, increasing scrutiny as full capacity is restored.