Microsoft's Azure cloud-computing business delivered another quarter of blockbuster growth on Wednesday, powering revenue above Wall Street's expectations and showcasing the growing returns on its massive artificial intelligence bets.

Microsoft significantly exceeded earnings expectations for the June quarter and disclosed its standalone annual Azure revenue for the first time — providing new clarity into how it stacks up against Amazon and Google in the cloud.

The Azure cloud business is a centerpiece of Microsoft's efforts to shift its focus to artificial intelligence, but until Wednesday the company hadn't disclosed how much money it makes.