HP Color LaserJet 8550 Multifunction Printer series - Manual (Page 248)

248 Chapter 8 Administration Functions
EN
System Password
The System Password function allows a key operator or system
administrator to set the password for the Administration (Additional)
Functions settings. If a system setting password is assigned,
restrictions can be placed on storing, changing, or erasing the
following items:
! Department ID Management (Department ID and password)
! The system settings password
Note A password is not assigned for the factory default setting of System
Password.