Have you followed the steps mentioned at the bottom of the deployment page:
To enable FMOD Studio the use of any microphone input, including Kinect, on the Xbox One. The Engine ini file specific for the platform, located in /Config/XboxOne/XboxOneEngine.ini, needs to have the following lines added:
[AppxManifest]
Package.Capabilities.mx:Capability[0].Name=kinectAudio
Package.Capabilities.mx:Capability[1].Name=kinectGamechat