The SP5-420 settings enable/disable User Authentication for specific MFP applications.

SP 5-420User AuthenticationValue (Default: 0)
SP5-420-001Copy0 (ON)1 (OFF)
SP5-420-011Document Server
SP5-420-021Fax
SP5-420-031Scanner
SP5-420-041Printer
  1. Enable User Authentication for the device as a whole:
    User Tools > System Settings > Administrator Tools > User Authentication Management
  2. Use the SP5-420 settings to specify the applications to which User authentication is to apply.