Canon imageRUNNER 3530 Reference Manual page 284

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Department ID Management
Select [On] or [Off] ➞ press [OK].
Allow ID Unknown Printer Jobs
[On]: The machine accepts print jobs from computers that do not correspond
with a registered Department ID.
[Off]: The machine does not accept print jobs from computers that do not
correspond with a registered Department ID, and you must enter a
Department ID and password to operate the machine.
Allow ID Unknown Remote Scan Jobs
[On]: The machine accepts network scan jobs from computers that do not
correspond with a registered Department ID.
[Off]: The machine does not accept network scan jobs from computers that do
not correspond with a registered Department ID, and you must enter a
Department ID and password to operate the machine.
NOTE
If you selected [On] in step 2, pressing [OK] activates Department ID Management.