You're referring to the Microsoft Activate Xbox feature, which is likely related to the Xbox activation and verification process. Here are some ideas for useful features that could be developed regarding this topic:
Choose "Individual" as the account type (cheaper than "Company").
When you turn on a brand new or factory-reset Xbox, the on-screen setup wizard will ask you to sign in with your Microsoft account. At one step, a QR code may appear on your TV screen. Scanning that QR code with your smartphone takes you directly to https://aka.ms/activatexbox to complete the sign-in and activation process.