Open the printer properties dialog box, and then click the [Advanced Options] tab.
Select the [User Authentication] check box.
If you want to encrypt the login password, click [Driver Encryption Key...].
If you do not want to encrypt the password, proceed to step 6.
Enter the driver encryption key already set on the machine.
Click [OK] to close the [Driver Encryption Key] dialog box.
Click [OK] to close the printer properties dialog box.
Open the document you want to send from an application.
Select [LAN-Fax Generic] as the printer and then start the print job.
The [LAN-Fax Generic] dialog box appears
Click the [User Settings] tab.
Enter the login user name and login password already set on the machine or server for user authentication.
Click [Send], [Send & Print], or [Print].
If you enter an invalid login user name and login password, sending and/or printing does not start.