Xbox Marketplace purchases come with two licenses: system and local. Respectively, you can use the purchase wherever you're logged in with your gamertag ("system"), or with any gamertag on the console associated with the purchase ("local"). When is this "local" license assigned?
Scenario 1
If I make a purchase on a console, is the local license assigned when the content is finished downloading, when the download is initiated, or when the download is first added to the queue?
If I buy an item on console A but don't finish downloading, and later log into console B, will the download automatically queue to redownload on this console B? Accordingly, is the local license then assigned to console B?
Scenario 2
If I make a purchase on Xbox.com, is the local license assigned to the first console I log into? Or is it assigned to my home console somehow? Is there no local license automatically assigned at all in this case (unless reassigned with the License Transfer tool)?
Best Answer
SCENARIO 1:
The license is given at time of download to the system with the system license meaning that any user who plays on xbox live has access to the license on that particular machine. Then if you go to Console B and sign in, users playing on Console A would have the DLC and you would be using a "local" or what I would consider to be a "Roaming" license to play the same DLC on Console B. Just because you redownload on B does not invalidate DLC on A.
Scenario 2:
As Dominik said it would be assigned to the first console that connected with your Gamertag.
To my knowledge there is no method of associating a gamertag with a "Home" xbox. I will usually go reverify all licenses are owned by my personal main xbox by performing a license transfer. There used to be a method of doing it in the xbox website but has since be removed.
EDIT: This Answers are for the Xbox 360 not the Xbox One. Xbox one allows the same system and profile license and even identifies "Home" Xbox's. More info can be found at Xbox's website and even allows Sharing.