As stated here multiple times, IMAP is supported by both Exchange and Mail.app and works fine for connectivity. What would be REALLY interesting would be for Mail.app to support the https protocol like Entourage does (i.e. Entourage hijacks the web interface of Exchange to get access to email, calendar information, etc. This is VERY handy as a roaming user, occasionally on various other corporate sites, etc., as it almost always works first time, everytime, as almost all sites do not block outgoing 443 traffic. imaps filtering is not too uncommon, and you can forget about trying to use smtps. The other alternative is bringing up a ipsec tunnel -- which is also almost always filtered at the corporate firewall.
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As stated here multiple times, IMAP is supported by both Exchange and Mail.app and works fine for connectivity. What would be REALLY interesting would be for Mail.app to support the https protocol like Entourage does (i.e. Entourage hijacks the web interface of Exchange to get access to email, calendar information, etc. This is VERY handy as a roaming user, occasionally on various other corporate sites, etc., as it almost always works first time, everytime, as almost all sites do not block outgoing 443 traffic. imaps filtering is not too uncommon, and you can forget about trying to use smtps. The other alternative is bringing up a ipsec tunnel -- which is also almost always filtered at the corporate firewall.