Hello Tomahawk,
I wonder if you setting just got disabled for some reason? I searched the Knowledgebase and found the steps to enable settings like Automatic 2 sided print which may fix this issue for you.
I have WorkCentre 6505 DN printer. I do a lot of two sided printing and it normally does a great job of auto feeding paper to two side print. All of a sudden, the printer has switched to ask for manual feed. How do I get it switched back to auto feed?
Thanks for any help.