I have a few users running into the issue detailed here (Except we are running Office 365 Enterprise):
User A sends an Excel file to User B, when User B prints it, it will go to User A's job box on the printer. I have tried implementing the fix suggested in the above article at this path "Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Excel\Options" but it has not resolved the issue. All that has done is cleared out User A's job box number and password when User B tries to print but it's still trying to send the job to a job box instead of picking up User B's printer settings.
I have also tried to update User A's Office but it is fully up to date.