Disables the "Username" field on the GUI login. To disable the field on the GUI login, create the registry entry and put a "1" in the value. The disabled field will still appear on the GUI Login and the user will be able to read the information in the field, but it will be grayed out and the user will not be able to change any of the information stored in the field.
|Registry Path||SOFTWARE\Novell\Login\Tab Settings\Credentials|
Default is 'Off'.