Delete AD User Operator throw error

hi, I am using the delete user operator under /Base [1.9.1]/Library/Operations/Active Directory/.NET/Users/Delete User

When I attempt to delete a user I notice that there is an error “ad user The directory service can perform the requested operation only on a leaf object”. 

Am not too sure if this is due to this user has multiple ipad devices tagged to him (attached the AD tree) therefore it meant that the user was not the leaf object. Like to check if anyone knows if there are there any other AD operators in HPOO which can help to address this.