We are currently running exchagne 2003 in a windows 2003 AD environment. I would like to start looking at exchange 2007, but am not sure what the best option would be for testing/familiarizing. Can I install exchange 2007 on a virtual machine and connect it to my current domain or will this cause problems? I assume the best scenario would be to setup a completely separate network, but I do not have the resources. What have people done in the past to test out exchange before doing an actaul transition?