We have an ongoing random issue with our printers. Randomly, printing will stop working. The 2 network copiers are shared out from the server. When it happens, we can't access the GUI, print, or even ping the IP or hostname of the printers. But, we can ping the printer and access the GUI from any workstation on the network. And if we install the printer directly on that workstation, it works fine. Once we reboot the server, it all works again.