Hi CP7,
Our users don't have the "Manage this printer" permission on the printer server. Make sure you do the auto configuration on the server and then set the Printing Defaults within the Printer Properties on the Advanced tab. That's all I did. The printer is then mapped via the LBP GPO.
If you map the printer manually as a standard user is the configuration correct? Probably best to confirm it working OK through standard UNC mapping before LBP mapping.