LDAP and Email Enrollment

HelIo

I am wonder is posibble to enroll via LDAP and email  from the same US?

For example customer have some LDAP . Every LDAP integrate with US and all is OK

But if don't want create extra account in LDAP for same user but enroll via email is posible?

I am trying to do and LDAP work fine for two LDAP but email enrollment don't work.