So “Vyshemirsky”:http://vyshemirsky.blogspot.com/2007/10/how-to-synchronize-ical-with-exchange.html found another solution to this problem called at http://ww.snerdware.com/groupcal and they have another than does the same for contacts to the Address Book. Although “Judi”:http://judismith.wordpress.com/2007/09/13/still-no-ical-exchange-sync/ found it buggy and it deleted appointments in Exchange and iCal (so backup before trying any of this!). And “some”:http://forums.macrumors.com/showthread.php?t=471498 think they are out of business.
There are real issues like “Justin”:http://justinhartman.com/2008/03/31/apple-ical-microsoft-exchange-fix-for-leopard/ point out and “Fragens”:http://thefragens.com/blog/2008/08/ical-exchange-time-zone-fix-chapter-2/ has a fix for. Outlook 2003 and earlier uses non-standard time formats like _(GMT+02.00) Harare/Pretoria_ whereas Apple uses _Africa/Johannesburg_ and so when iCal gets a calendar request from Exchange, it simply adds two hours to the event start time becaue it can’t deal with GMT+2. He wrote a script you run on your computer that runs in Mac Mail, it intercepts the message and then fixes the dates. Clever guy!