You're at a meeting, your loaner laptop securely in hand. You try to log-in using your x.500 and username, just as you do with your own computer every day.
Nothing happens . . . except the message you receive telling you that a server can't be found. You panic. Or, you just get really frustrated.
If you're checking out a laptop, you'll need to download your credentials via an ethernet cable (usually that blue thing) in order to log-in. The laptop should come with one of these cables in its bag, but you can contact CITSU if you can't find one. Make sure you do this in advance of when you need the laptop so that you know it works before showtime.