Since noone else has posted a reply,, here is the section from my .sif file [identification] JoinDomain=Your_Domain DomainAdmin=Your_Domain_Admin_Account DomainAdminPassword=Actual_Password_in_clear_text MachineObjectOU = "OU = DRDL Laptops,OU = DRDL Standard Computers,OU = DRDL Client Computers,DC = drdl,DC=newgrp,DC = co,DC = uk" This works for me. I think I have read somewhere that you can replace the password in clear text with an asterisk (*) and it will then prompt for password, but I have not tested that. The actual link to the Microsoft technet document is here: http://www.microsoft.com/technet/prodtechn...0e0d7ae878.mspx