There are two ways to set the printer Offline. Right Click Printer, Select
Offline and when the device was installed to a Plug and Play style port
(USB, LPT, 1394), then the port goes offline the printer is set offline.
Bringing the Plug and Play device online requires the port to be Online.
For the printer you can use the command line script prncnfg.vbs located on
\windows\system32
prncnfg -t -p "printer name" -workoffline (+workoffline will set the device
offline the same as the menu selection)