AppleからiTunes 8.01と同時にMobileMe Control Panel 1.2 (for Windows) がリリースされた訳なんですが、Proxyを経由できないのは相変わらずの様です。 Apple - Support - Downloads - MobileMe Control Panel 1.2 (for Windows) This update provides better support for syncing a large number of contacts (more than 2,000) and prevents syncing of data between Microsoft Exchange Server and MobileMe, a configuration that is not supported. で、Appleのサポートページを見