The company has been running pilot tests to up the usage of AI tools among its community of developers and was planning a wider release of Microsoft 365 to its teams for the first time, the report said, citing an internal message. Microsoft did not immediately respond to a Reuters request for comment. The company's investment and partnership with OpenAI, along with rapidly growing cloud business thanks to customers looking to build AI applications, has made Microsoft the world's most valuable company, surpassing Apple.