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I can print from my HP laptop but my Iphone and IPad wont recognize my Canon MF644cdw printer.  they all say no airprint printers found.  I restarted all the devises and modems, made sure everything is on the same network, and checked network status ...
I have a mf644cdw printer but I cannot scan both sides of the document when I use the paper feeder.  Does anyone know how to turn on the duplex scanning. Likely an old problem, previously resolved, but new for me. thanks