Hello,
Excuse me my English I used a online translator.
I have lost very, very much time with this Exchange problem since July 27. I upgraded on mountain lion!
I have experienced all the above errors (internal server on one time with .local extension, messages on the server are not visible and also crashing of the mail apps).
I am quite sure that the error on the part of Apple ML is caused.
Because everything with my Exchange account on
iPhone,
iPad,
Windows 7 with Parallels with Office 2010 and
Mail to Lion 10.7.4 runs without problems.
Mountain Lion I have installed umpteen times (acquisition of the lion or clean install, etc.).
But what surprises me is that since I am switched to Exchange online on Microsoft (www.offce365.com) I don't have any problems. In any case still not (for three days)?
Most of the problems I have had with my Exchange hosting www.df.eu (Exchange 2007 on Windows 2003 R2 server),
then I had www.cortado.com (Exchange 2007 on Windows 2008 R2 server) and
then I was at www.qualityhosting.de (Exchange 2010 on Windows 2008 R2 server).
I mostly problems had with Hoster DomainFactory and the fewest problems with QualityHosting.
But I never had problems as I switched to Microsoft Exchange Online.
The only advantage with so much lost time for me is that I now have 25 GB available instead of 16 GB space on Echange Account and decreased the price of 12.95€ / month at only 3.57€ / month.
I wouldn't like to make here advertising, I now also thinking (after trying FOUR Exchange Hoster) that a configuration of Exchange in addition could be the answer additional to the error with Apple bug in ML?
I know that many Exchange user have own company server and a change to the online services of course is impossible.
Hopefully will come up a solution with 10.8.1
Dear greetings to all.