install outlook on a few computers make a few users in AD and create them mailboxes, try sending mail to each other, you could try creating a few public folders, theres not a great lot you can do with exchange straight off, its only when you need to block certain domains from sending to you, stuff like this when it takes a bit of knowledge. but most can be found through www.slipstick.com its a great exchange resource also you could try setting up OWA (outlook web access) and OMA (outlook mobile access) both can be accessed internally and externally using your internal/external ip so theres something to try other than this i cant think of much else to do with it straight off