I apologize if everyone already knew this but I wasn't aware until this came up while I was on the desk today.
Guest Printers are not installed on all of the computers on the main floor. Chris is working on getting them reinstalled on all computers but for now, only the six computers closest to the Reference Desk are available for Guest Printing.
I'm not sure how long it will be before all the computers have Guest Printing again.
If you have any questions, please let Systems know.