Gerado, as Mark said, open Updox, go to Admin and near the bottom of the drop down menu you should see "AC User Mapping". But before you do this, make sure that AC Auth Service is running or you will have problems on the next step (or possibly this one).
The training video on the website is very poor and does not provide sufficient information to do this. Updox sent me an email telling me how to do it (I had already mapped my users).
