OH MY. I just got off the phone with a very nice lady at Canon Support. This is a single side printer. The way to know is MF641Cw. C for color, w for wireless. If it was duplex like my old MF244, it would have a D in the name, as in MF244Dw. So,...
I just did a factory reset, deleted printers off the windows 10 pc, and reinstalled. Still no go. Looks like everything is ready to go. driver sees 2-sided copy, changed setting to 'preview' as attached jpg shows. NO GOOD. Oh well, looks like a ca...
I have a MF641Cw with the latest drivers/firmware on win10. Everything works except 2-sided printing. It's set in the driver as shown on PC and on the Android Business App it is grey'd out, not selectable (just checked again on app and 2-sided isn't...