Microsoft Corp (MSFT.O) and the NBA said on Friday they have joined forces to put “virtual” fans in the stands of each game using Microsoft’s Teams app and giant screens.The two will equip each game court with 17-foot-tall (5.2 m) LED screens that wrap three sides of the arena. The virtual stands will be filled with fans who use the Teams app to log in and sit alongside each other using a new feature of the app called “Together mode” meant to simulate a group of people sitting in a room.NBA officials said audio from the virtual fans will be played in the arena and televised. Virtual seats will be limited to 320 fans, a number based on the size of the venue and scre source