Press the [Home] key on the top left of the control panel, and press the [Address Book Management] icon on the [Home] screen.
Check that [Program / Change] is selected.
Select the name whose protection code you want to register.
You can search by the registered name, user code, folder name, or e-mail address.
Press [Protection].
Press [Destination] or [Sender] under "Use Name as".
Both [Destination] and [Sender] can be selected at the same time.
Press [Folder Destination] or [Sender] under "Protection Object".
Press [Change] under "Protection Code".
Enter a protection code using the number keys, and then press the [] key.
Press [OK].
Press the [User Tools/Counter] key.
Specify a protection code of up to eight digits. You can also specify "Protection" without specifying a protection code.