Canon i-SENSYS LBP6670dn User Manual page 785

If you use department ID management
Enter the department ID and password in the fields marked [Department ID] and [PIN].
If you do not use department ID management
Enter an arbitrary ID and password in the fields marked [Department ID] and [PIN].
6
Click [Update].
Authentication information is set.
IMPORTANT
When cancelling authentication information
Click [Delete].
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