Sync your iPhone with Microsoft Entourage
I must admit I'm a bit surprised that this slipped past me, so I hope I'm not the only one that didn't realize Entourage can sync with the iPhone via its oft-forgotten ability to play well with Mac OS X's Sync Services. According to this Apple support doc, switching on the preference you see above in Entourage 11.3.5 or later will break down the barriers between Entourage, Address Book and iCal, allowing iTunes to unite your iPhone and Entourage in beautiful synching harmony
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