Take a look here, it may help:
http://www.slipstick.com/outlook/share.htm

"Alan C" wrote in message
...
We are using OL2k3, and would like to be able to share calendars between 3
users. I know 'Net Folders' were available in OL98 and OL2k but I think
not in later versions.

Am I correct in this, and if so, can anyone point me to a 3rd party
solution?