To find the MAC address on your Xbox One, Series S|X follow these simple steps:
- Open the Xbox Guide by pressing the Guide button on the controller.
 - Navigate to the Settings page.
 - Select Network.
 - Select Advanced Settings.
 - 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: