How to register new DWA users + OpenLDAP

OK… I should refine my title re: register. I know that DWA users do not need Notes IDs. How does DWA redirect know where to send the user? I’m assuming that the LDAP directory needs to be a part of directory assistance + have a mailfile field added? It seems simple enough to add the mailfile field to OpenLDAP BUT how do you populate the fields? There has to be some sort of registration option -w- the OpenLDAP as the receiving directory… or not?