Asking for an EMail adress if LDAP not populate with it...

When using LDAP Authentification, it's now possible to get EMail adresse (even without LDAP Data Module).

But if the LDAP directory don't have any value in the "mail" attribute, could it be possible for LDAP Ath to go to the USER/EDIT form for asking EMail adress (only a the first login process that create the account) ?

Thanks.