Registered data editing method, registered data editing apparatus that edits all of a plurality of pieces of individual registered data which includes at least department data, and image processing apparatus

When a piece of management department data of target manager data is non-restriction data corresponding to all departments, a processor executes a first data editing process to edit all of a plurality of pieces of individual user data. When the piece of management department data of the target manager data is restriction data corresponding to a particular department, a processor executes a second data editing process to edit particular user data that is a part of the plurality of pieces of individual user data. The particular user data is one of the plurality of pieces of individual user data that includes a piece of belonging department data that indicates a department that has a predetermined correspondence relation with the particular department that corresponds to the piece of management department data of the target manager data.