Yes, I have a full list of the user's groups when I do that.
Mine's installed on a domain-joined 2012 R2 machine with 2012R2 DCs, but I just noticed it's only on Windows Server 2008 R2 domain functional level.
What do you get when you go to https://hapserver/HAP/setup.aspx, re-enter the domain information on the Active Directory tab, and click the "Students group" box? it should display your domain OUs, etc.