I am using a Windows 2008 R2 domain controller and File Server. Whenever I add a network printer I always make sure the "List in the Directory" (meaning Active Directory) is checked under the sharing tab in the properties of each printer. On Windows XP machines I can go through the add printer wizard and it finds all printers in the domain.
On windows 7 professional clients when I got to Add Printer then select "Add a Network, Wireless, or Bluetooth printer" it does not find any network printers from my file server. I have the file and print sharing enabled on the win7 clients and the File Server.
I'm not sure why Win7 clients (Win 7 pro 64 bit) won't show the list of network printers from that file server.