Multiple domain access to VMware View 5.3 environment

I am having a hard time figuring out how to allow a client to authenticate from a webtop to one of two domains. My configuration works flawlessly directly from the view client but the roadblock has been in figuring out how to add an additional domain to the webtop for authentication purposes. These domains have a two way trust. Here is what I am after in order of importance: User simply enters username and password and is connected to the list of desktops available. Create a dropdown box in the webtop to select one of the two domains. Last resort would be having the user type xyz@xyz.org

I am willing to modify the access policy however I am not sure what logic needs to be added for the 2 domain setup. This situation has me stumped because I am not even sure I have the second domain setup correctly since I have not been able to find any instructions on this.