The Federal Trade Commission is preparing to launch an investigation into anti-competitive practices at Microsoft’s cloud computing business, as the US regulator continues to pursue Big Tech in the final weeks of Joe Biden’s presidency.

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.

The agency’s antitrust investigation continues Biden administration scrutiny of Big Tech as the industry waits to discover what policies Donald Trump adopts.