Turn on your controller by pressing and holding the Xbox button. (The Xbox button is located in the middle of the controller near the top.) The Xbox button will flash. When the button stays lit, the controller is connected.
Note If the controller doesn't turn on, check the batteries. If you're using rechargeable batteries, make sure they're charged.
Press and release the connect button on the Xbox.
On Xbox One X and Xbox One S, the connect button is on the front right, below the power button.
On original Xbox One, the connect button is a circular button on the side, around the corner from the disc tray.
Within 20 seconds, press and hold the controller’s connect button (a circular button on top of the controller as you hold it in your hands) until the controller's Xbox button flashes a few times. That means it's searching for a console. The Xbox button stays lit once it's connected.
Repeat this for every additional controller.
You can connect up to eight wireless controllers to a console.