Automatic Login of RDP Sessions

Has anyone found a solution for creating a bundle that connects to a windows terminal server using RDP? I am trying to create a thin client bundle for an RDP connection to another network resource on a different domain, so that user name/password is different. It works fine in Zfd 6.5 but ZCM does not work Im guessing due to the passthrough authentication? I have tried to add the domain a few different ways (listed below) but nothing seems to work.

\domain.org
\domain\
\domain\?

Any suggestions or work arounds?