Are you planning to rebuild the Unity box completely, or just unplug it from the wall, walk it down the hall, and plug it back in to the real network? Your subscribers will still exist in Unity, but the actual mailboxes will be missing if you do the latter. I do suggest uninstalling the "Unity Configuration" from the Add/Remove Programs control panel, and then rerun the configuration setup when you've moved the box to its new location. Otherwise, with the names of everything being the same, there *shouldn't* be any other problems (although name resolution may be an issue if the name/ip address mappings in DNS or netbios are different).
adam