Microsoft said unexpected server failures disrupted Outlook, Teams, Copilot and other services. The outage also affected Microsoft 365 connectors used by OpenAI and Anthropic, disrupting connections and the functioning of AI tools. Microsoft 365, Outlook, Teams and several other Microsoft applications remained disrupted for thousands of users for over seven hours on Friday, with the outage also affecting OpenAI and Anthropic's AI services through their Microsoft 365 connectors.