What are the requirements for using the HP Envy 6400e as an HP+ printer?
HP+ printers must remain connected to the Internet at all times in order to function, as they are cloud-connected devices. You must use original HP cartridges, as non-Original HP or refilled cartridges will prevent the printer from operating as expected. You also need to create or sign into an HP account to manage your printer.
From the official HP Envy 6400e All-in-One Printer manual, page 26
Have a follow-up question?
Answers from the official manual.
Common questions