Need network connection to authenticate network credentials at login
I have two MacBook Pro Retinas in my business environment. I have both joined to the domain with network logon functionality enabled, however I cannot pass credentials to our wireless network prior to loggig into the machine. I cannot log into the machine because it is not connected, and therefore cannot validate my credentials for the first time in order to cache them locally.
I finally broke down and bought two tunderbolt to ethernet adapters so I could just plug into my wired network and deploy these machines. I am not connected, however the MacBook will not "connect" to the wired network until I've logged into the machine, so I am still faced with the same issue. How can I have the MacBook connected to the network so that I can use network auth credentials to log in?
MacBook Pro with Retina display, OS X Mountain Lion (10.8.2)