When adding a user individually to module permissions grid you can only add by the users Display Name now.  This used to be done by Username.  It looks like it changed between DNN 7.0.2 and DNN 7.3.4.  This new way is useless if you have thousands of users and many of them have display names that are not unique. How are you to identify which John Smith you are looking for without the Username?  Please tell me there is a setting somewhere to change this back to Username but I have not been able to find one.

Thanks!