[Microsoft is stepping up efforts to repair Outlook and Copilot system failures, affecting users in many places around the world] November 13: After a half-day service outage, Microsoft is still working to restore access to its flagship software. Users are unable to use email and chat services. This is one of the most serious service outages for the technology giant in recent years. On Friday, users around the world reported glitches with Outlook, Teams and Copilot artificial intelligence tools. The day before, many users in the United States were unable to use these services. There are about 200,000 user issue reports related to the service outage on tracking platform Downdetector. It is one of the company's most serious service outages. Previous service outages rarely lasted more than a few hours.