In "Address Book Management", specify the login user name and password to be used for "User Authentication Management".
For the characters that can be used for login user names and passwords, see Usable characters for user names and passwords.
Log in as the user administrator from the control panel.
Display the [Address Book Management] screen.
When using the standard operation panel:
Press [Address Book Mangmnt].
When using the Smart Operation Panel:
Press [User Tools] () on the top right of the screen.
Press [Address Book Management].
Select the user.
Press [Auth. Info].
Press [Change] for "Login User Name".
Enter a login user name, and then press [OK].
Press [Change] for "Login Password".
Enter a login password, and then press [OK].
Re-enter the login password for confirmation, and then press [OK].
Press [OK].
Press [Exit].
Log out.