Google previously accused Microsoft of anticompetitive practices around Azure, and Mozilla-hired researchers criticized ... app from the rest of the 365 suite due to antitrust concerns. FTC Chair Lina Khan has made a point of probing Big Tech.

The Federal Trade Commission, led by Lina Khan, had previously sought public feedback on Microsoft's cloud computing business.

The probe would be the latest regulatory scrutiny against Big Tech from FTC Chair Lina Khan. Microsoft already faced a challenge from the FTC under Khan’s leadership targeting its acquisition of video game publisher Activision Blizzard, a $69 billion deal that was one of the largest in tech history.