I have a printer which is shared to Windows.  When printing users may be print Grayscale (b&w) or Color.I would like to configure CUPS in order to get all the jobs printed in GrayScale (B&W), regardless the user printed it in color or not.If the default configuration is select to GrayScale as in question How do I make black&white the default? , then the final result is as the user requested : GrayScale or Color.
CUPS how to enforce B&W printing for a queue?
printing;cups