DLC Transferable?

Hello.
I am here just wondering if somebody could possibly help me out.
I have “family xbox live”. The main account of the family has the DLC downloaded and works fine, but at the moment I am trying to make the downloaded content work for other accounts on the same xbox. I did this in halo reach, unfortunately i cannot remember how…
So without buying the map packs again, would anybody be able to direct me in the right path. Thankyou

This might be better posed to Microsoft Support.