Watch this video to see how easy it is to make mass changes to Active Directory from an external text file without using complicated scripts.
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http://msfreaks.wordpress.com/2013/12/09/windows-2012-r2-remote-desktop-services-part-1/
http://www.wackytechtips.com/installing-and-configuring-remote-desktop-services-rds-on-windows-server-2012/