Dudes,
Tgara - Wise words at last! Apple invests millions in providing these forums for one reason - to assess customer feedback, to think they ignore this stuff is madness. I think it is so funny when people complain about a product and ignore the fact that Apple asks for feedback every step of the way.
I've been following this post from the beginning and it seems to have gotten a little lost and exposed to a bit of Voodoo mythology. So;
IOS working fine, that's because by default IOS only uses the external server.
It worked in Lion, I had to manually enter my external address settings in Lion before I could get it to work. Don't get me started on all the problems SL has with EWS exchange accounts.
Host file fix, yes it works and is the current only immediate WORKAROUND for all of those users who have a hosted service, or operate off the same internal network as the exchange server, don't connect to the exchange server via VPN and can't instruct an IT department to make changes to their exchange autodisovery settings. This fix is also not difficult to perform, especially given some of the fantastic advice given on this forum. If you can't follow simple instructions then maybe exchange not working on your MAC ain't your biggest problem 😮.
Exchange is causing the problem, maybe for some of you as I doubt every sing exchange server is correctly configured. Go to https://www.testexchangeconnectivity.com you can pull down your autodiscovery XML, from what I can tell it is correct, although I am no expert and have asked my hosting service to verify.
ML is bugged, maybe, but I suggest it is more a question of it not being compatible with a lot of exchange setups in it's present form, it aint with mine and a fix from Apple may help.
Changing the autodiscovery interval on the client, doesn't work as once connected to the exchange server it pulls the autodiscovery settings directly from the EWS folder. FWIW I removed the autodiscovery DNS record for one of my domains, flushed my cache and then went to configure my account. Bingo - no autodiscovery, manual control of server settings - for all of about a minute - once connected ML mail pulled them directly from the server and updated them. You can see it doing this in the activity window.
An override is the best fix, wrong, that means autodiscovery doesn't work on the MAC and Apples out of the box compatibility with MS exchange brag doesn't live up, given current rivalry between MS and Apple I doubt this very much. Windows certainly doesn't support exchange out of the box, indeed you gotta by outlook!
Outlook for MAC is a suitable solution, IMHAHO, NO IT IS NOT, it is a menace and not fit for purpose. Another deliberate attempt to devalue your MAC experience.
Running out and upgrading business critical, personal critical, all your office machines or any other important computer to the first edition of a new OS, is frankly daft, FOR EXACTLY THIS REASON 😠. Have you learnt now?
Missing email, folders or other erroneous anomalies that are being reported are unlikely to do with this thread. However, I suspect some users may be having problems due to incomplete syncronisation with the exchange server. For the novices, check your activity window in mail>window>activity - when it goes blank you know your done. If a rebuild doesn't cure it delete the account and start again, checking that you get fully syncronised before you close it.
Finally for the school of thought that autodiscovery is configured wrong check this article http://krypted.com/mac-os-x/how-exchanges-autodiscover-works-with-mail-app/ .
If you are that angry submit feedback to Apple through the feedback feature in mail.app. In the mean time, use OWA if you have access to it or go off and explore the rest of Mountain Lion which is the greatest version of Mac OSX yet and IMHO the best OS on the market.
Have fun, play nice and respect others!!!
P.S. 2012 London best Olympics ever!