I am trying to connect my QC35 I to a Bluetooth device connected to my Xbox. I can put the headset and other device into pairing mode but the headset does not recognize the request to pair from the other device. It just says it's ready to pair repeatedly. The other device is just a single button for power/pair. it plugs into the controller.
You will require to connect your headphones directly with the audio input cable. If you require to use the inbuilt microphone within your headphones, please look into the QuietComfort 25 inline control input cable, this way you will be able to use the microphone function.