Login Screen for Remote Desktop Session Collection from WTOS

Repost from the old Wyse ThinOS Forum since I haven't found a definitive answer...

I'm in the process of setting up a new Server 2012 R2 environment.

So on the thin client I change my connection broker to Microsoft, add some details and everything connects great to my Remote Desktop Session. I then can select my collection and it auto connects. BUT I was wondering if it was possible to have a login screen similar to windows.

For example in our current environment we have an .ini file that points to the RDS server. Once the thin client is configure (with dns, domain, and filepath) upon restarting it pulls in the certs from the ini and then auto loads the Windows screen for the rdp connection specified in the .ini file.

Is this possible for a Remote Desktop Session Collection in Server 2012 be accessed in the same way? We want minimal effort from the customer and still have them seeing the windows screen they are familiar with. I've gotten it to pull the certs with the ini but I'm not sure if there is a way to surface the login so it looks like a Windows 7 or 8 login.

I'm beginning to think not since I've read Server 2012 RDS Host requires authentication before allowing a connection vs 2008 R2 that you could connect to, then authenticate/log in.