You should use "Access Profiles" if you need to:
a. Restrict the application access with Active Directory Authentication.
b. Specify different access levels for different users and groups of users.
c. Make the users' experience faster by configuring predetermined RDP preferences for each profile.
d. Unify authentications in a Single Sign-on schema.
e. Allow external application to manage Thinfinity® Remote Desktop Server users and machine permissions through the use of a Web Service.