Thanks in advance for all the great support and help on this site.<br><br>We are currently running 3.02 and want to upgrade to the latest version. The messages are stored off box and Unity connects to an Exchange 5.5 environment, with two call managers for call processing. <br><br>The Unity box is running Win2K, MSDE and the connector.<br><br>What is the best method for staging a Unity upgrade to test it before applying changes to the actual box? Is it as simple as pulling the mirrored drives like a CM upgrade and reverting to the old drives in case of failure? Or should be practice our disaster recovery and restore Unity to a different box and then practice upgrading on that recovered box? Can I turn off the production box late after hours and bring up the recovered box to test, or will that confuse/corrupt the Exchange servers?<br><br>