How do I set a default domain for RD Web access 2012?

I am deploying a remote apps collection for our users.  I do not want them to have to specify the domain along with their username.   How can I set that so it only needs username and password?  Thanks
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Ayman BakrConnect With a Mentor Senior ConsultantCommented:
Check the following thread, specially Lionel's second and third solutions and Ross's solution:

Lionel's second solution is also elaborated by Clint Boessen here:
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