Please Help!! Naming Format

Please Help!! Naming Format

I am trying to create a naming format for ADManager Plus.

The standard account is the initials of the name.
 
example.
Name: John A. Cruz
Account: jac

I would like to ask how to create a user with two lastname?

for example:

Name: Robert G. Dela Cruz and his account will be going to be
Account : rgc
 
because that is our standard naming format.
 
can you help me on how to create this format?

                  New to ADSelfService Plus?