Rational Synergy uses the Rational License Server TL. The Rational License Server TL is a FLEXnet-based license server used to manage licenses for Rational Synergy, IBM® Rational® DOORS®, and IBM® Rational® TAU® products. You must install the Rational License Server TL separately from the product installation process documented here in order to run Rational Synergy, even if you are not running other products. Install the Rational License Server TL before you perform the Rational Synergy product installation.