The error you are having is because you have a proxy on your network or the devices can't reach the internet. This is very useful so you can have a automatic reorder of toners. Because you have a lot of devices, I recommend that you install the XDA-Lite that will do the same but is a program installed on a pc and do it centrally to all your printers. You can download it from here:
To deactivate this service from your devices, go to the device webpage -> properties -> General Setup -> SMart eSolutions Setup -> set "not enrolled". You will never have the error message again. Do it to all printers.
Be sure to give out Kudos and select "Accept as Solution"