I am trying to evaluate 3CX Phone System to connect to Exchange UM. Downloaded the Free edition, activated the enhanced DEMO key I got by mail, restarted the services. Everything Ok so far, even can call between 2 PC's. I am following this Guide http://www.3cx.com/support/exchange-server-2007.html. But I am missing this option: According to the e-mail with key i received: "If you wish to test the features of the commercial edition, you can use the DEMO license key. This key enables all features, but limits the number of concurrent calls to 2." Am i doing something wrong?