Lexmark XC8155
From the home screen, touch Settings > Device > Preferences > Run Initial Setup.
Turn off the printer, wait for about 10 seconds, and then turn it back on.
From the Before You Begin screen, select Change the Settings and Continue with the Wizard.
From the Fax/Email Server Setup screen, enter the needed information.
Finish the setup.
Use the setup wizard to configure your printer to send fax messages.
Enabling this application allows you to enforce user quotas for printing, scanning, copying, and faxing tasks.