Accessing Your Xbox Live Account at a Friend's House
You cannot simply "log in" to your Xbox Live profile on a friend's Xbox 360/One and play your games. Licenses are tied to the Home Console, not just the account.
How Licensing Works
Home Console (Your Xbox): Anyone signed in can play your digital games / Game Pass. No internet required after initial check.
Away Console (Friend's Xbox): You must be signed in AND online to play your digital games. If internet drops, games lock after ~15 min.
Disc Games: Work on any console, no license check (except day-one patches).
Your Options
Bring Your Console: Easiest. Plug in, play everything offline.
Xbox Cloud Gaming (Game Pass Ultimate): Stream your library to friend's PC/Phone/Tablet/Smart TV via browser/app. No console needed. Requires 20+ Mbps stable.
Remote Play (Xbox App): Stream from your home console (must be on/Instant-On) to friend's PC/Phone. LAN/Wi-Fi quality dependent.
Game Pass Ultimate Sharing: If friend has own Xbox + Game Pass Ultimate, you sign in on their console → access Game Pass library. Your owned games (non-GP) still require your Home Console.
Designate Friend's Xbox as Your Home Console (Nuclear): Settings → General → Personalization → My Home Xbox → "Make this my Home Xbox". Limit: 5 switches/year. Then they play your games offline. You lose Home benefits on your console.
Best for visiting: Cloud Gaming (Ultimate) or bring your Series S (small).