Turn on the Xbox One console
Turn on the controller
Press and hold the Xbox button on the controller until it turns on
Press and release the Pair button on the console
Press and hold the Pair button on the controller until the Xbox logo flashes rapidly
Wait until the Xbox logo stays solid
If needed, connect the controller to the console with a USB cable
Press the Xbox button on the controller
Press and release the Pair button on the console again
Press and hold the Pair button on the controller again until it reconnects
Replace or recharge the controller batteries if it still will not sync