TV app wants a code on the microsoft link page, how does it work?

make sure the browser is signed in to the same microsoft account that has the subscription. if it's already logged in to a work or school one, the code goes on that account and the TV says nothing's there. a private window avoids it.

type the web address the TV shows into your phone or laptop browser, sign in with your microsoft account and enter the code. the TV picks it up on its own after a few seconds. if it says invalid, the code expired, they only last a few minutes, so get a fresh one on the TV and do it straight away.