To find the MAC address on your Xbox One, Series S|X follow these simple steps:

  1. Open the Xbox Guide by pressing the Guide button on the controller.
  2. Navigate to the Settings page.
  3. Select Network.
  4. Select Advanced Settings.
  5. Your MAC address(es) will be listed next to "Wired MAC" & "Wireless MAC" on the right hand side of the screen (this is also where the IP address and other information is located)

To add your Xbox One, Series S|X MAC address follow the steps outlined here: