And Outlook needed Exchange Server ($$$) to do so. Here's a link about other methods. Beware those that share how to do so across the network since I've seen it corrupt the email files and the owners get upset since they didn't backup.
See http://www.slipstick.com/outlook/share.htm and other articles there.
I have set up a home network with a desktop running XP Home connected to a wireless router and a Notebook running XP Professional. I was wondering if it is possible to share all the contacts and messages on the desktop to the notebook.I am able to share files and photos OK.