I have a new Dell Inspiron 15 5000 and I can't print using auto duplex.
Picking double sided asks me to feed the second side manually. I can install auto duplex in Windows settings by updating in the auto config drop down. I have tried printing both before and after restarting and the result is the same. When I go back to settings after trying to print a Word doc, the auto duplex is not installed again. I followed a post from @gg1707 06-10-2019 on the user forum and reinstalled the printer but that did not change the result.
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".