DEP with Active Directory Binding

I'm trying to setup DEP along with an Active Directory Binding at enrollment once an employee authenticates with their username and password to perform the following:

1. Create a mobile / admin account at first log in
2. Name the computer using the newly the created account username

I've tried setting up both a PreStage Enrollment and Configuration Profile with the mobile account option checked along with the $USERNAME entered in the client ID field with no luck.

Someone suggested I make a policy after enrollment with the a binding trigger at Login but that option does not create a mobile account and cannot set the client ID name from the user that just logged in.

Any help would be greatly appreciated.