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

Signature
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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, Mark asked:
| My wife and I both use Outlook's calander and enter apointments on
| our own computers. We are conected by a local network. Is there
| anyway for us to synchronize out calanders so they combine items from
| each computer?