Hello,
I've been using Developer Edition of ExB for a couple years and have a few apps developed for my organization. We've hired another GIS Tech and I am trying to get their installation of ExB to access the same apps that I work on (ie. not copies). We use the same admin account to download ExB, so the O Auth 2.0 client ID s the same. The login-info.json on both of our separate deployments is also has the same app id's, so everything should be matching up, but none of the apps are visible when they log in to either our Portal or Enterprise accounts.
I don't actually know if this is possible, but I assume that it is (or at least should be), because in our Web AppBuilder deployments, we're able to work on the same apps interchangeably without making copies.