The Federal Trade Commission is launching an antitrust investigation into Microsoft, according to a report. It’ll likely be Chair Lina Khan’s last chance to crack down on Big Tech. Khan personally signed off on a detailed request for information that the FTC has sent the software and IT company,

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

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.