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

Signature
--?
Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. Due to
the (insert latest virus name here) virus, all mail sent to my personal
account will be deleted without reading.
After furious head scratching, jwfoster777 asked:
| I need to share my outlook 2003 calendar, with my appointments from my
| receptionists desk (who does the scheduling) across the network to my
| computer. How can I do this?
Right click on Calendar and select Properties then the Permissions tab and
then find the name of the person you want to share with and then select what
view/edit permissions you want them to have.
> I need to share my outlook 2003 calendar, with my appointments from my
> receptionists desk (who does the scheduling) across the network to my
> computer. How can I do this?