Microsoft is being investigated by the Federal Trade Commission in a wide-ranging antitrust probe, making it the fifth Big Tech company to fall under such scrutiny in several years. The demand for information that spans hundreds of pages and culminates over a year of informal discussions with Microsoft competitors and partners.

The FTC has launched an antitrust investigation into Microsoft, according to multiple reports — corroborating earlier reporting by the Financial Times.

Microsoft is set to go under the microscope of the nation’s top antitrust watchdog, the Federal Trade Commission, which is launching a sweeping investigation into the tech giant’s practices.