We currently have one DNN Installation with over 20 portals. I recently had to migrate a site onto this DNN installation which was successful. The problem I encountered was when I tried to import the users using the Bulk User Manager module. I was not able to import three users. I did some research and it appears that those three usernames were already taken by other portals. Is there a way to have a user be part of more than one Portal? I have always thought portals and their users were separate. I guess that is not the case.