For a dozen years, I've had 3 pc's sharing an HP printer on a fourth pc. All of a sudden, these printers started printing to tray 3 instead of tray 2. And although the settings are still correct on these 3 pc's, they are greyed out. I've unshared and re-shared the printer on the host (fourth) pc. I've removed and reinstalled the software on the sending/printing pc's, by locating the shared printer in Windows Explorer and clicking the "Connect" option. The sending network user has always been a member of his local admin group (on all 3 sending/printing pc's). Again, the physical connection is fine because I can print to the shared printer. I just need to force it to print to tray 2 again, but the settings are greyed out.