More info: there are at least two ways to detect printers in the network:
1. Run Network Discovery task (Home -> Discovery and Inventory -> Network Discovery) in your network.
2. Import corresponding resources from AD (Action -> Discover -> Import Microsoft Active Directory, select "Import Print Queue resources...")
There are several views in the database which contain data about discovered printers like: vNetworkPrinter, vNetworkPrinterResource, vRM_Network_Printer_Item
Priners inventory information stored in the tabel: "Inv_ID_Network_Printer".
HTH,
Alex.