To my knowledge... you are correct.
So, to associate an offline Xbox Live profile with an online version is to do it from the offline profile...(Join Xbox Live)
There is an option in the Xbox Accounts dash area to remove and change your email address to another, although consider if it is already connected to another profile this may conflict.
There was once a way to copy a save and it would become yours although I'm pretty sure Live changed that after people using it for cheating and boosting.
In finishing, I suggest call Xbox support. Tell them that you want to do this, though pretty much at their end all they have to do is reimburse you the codes to put on your new account. Looks like you have to drop one though.
While writing out a more detailed description of the behavior, I stumbled upon the solution myself.
When you try to install the game over the internet, just let it start, and then cancel it. This will both remove the installation and download from the queue, but apparently also remove the knowledge of the installation from the Xbox One.
So:
- Start the online install
- Cancel it
- Return to the home screen
- Notice that the disc tile has now changed to "Install disc"
- Activate the disc tile to start the installation from the disc.
This worked, the game now installs from the disc. Obviously any downloaded DLC's will still need to be downloaded, but for the purpose of this question this is not relevant.
Now, what do you do when you get back home and want to plug in the external drive?
Here's what I did. I first uninstalled the game using the storage management.
This makes my Xbox One forget that I had the game installed. Make sure you don't delete any savegames you have on the console.
Then, you turn off the Xbox One, plug in the external drive, and turn it back on.
Once you do that, the disc tile still says "Install disc". Ignore that. Instead either use your pinned link to the game, the tile for the game (if it shows up on the home screen), or navigate to your games and apps list and activate it. You should get a message saying not to unplug the external drive, and that your game will be ready soon.
A few seconds later you can try again and the game should now start.
Best Answer
You will have no problems using the disc.
When the Xbox One was first announced, Microsoft introduced a model where newly purchased retail games would be licensed similarly to downloadable titles; you wouldn't need the disc to play if installed, and you'd be able to download and play the game with your Live account on any Xbox One console. However, this restricted used games, in that if you wanted to sell a retail game you'd have to go through a special deauthorization process that would only be offered at certain retailers (like GameStop) and would only be available with the game's publisher's consent.
Backlash to that model led to Microsoft adopting the same model as every other console, past and present: if you have the physical game media, you can play the game. In the Xbox One's case, you can still install retail games to your hard drive, but you'll need the disc in the tray to play.