Hi,
I have had a strange problem using KEMP LM's, Exchange 2010 and OS X 10.8. Every client configuration I have tried works, OWA, Outlook 2010/2003 and Outlook 2011 for Mac. The only one that refused to work is Mac Mail and the builtin Contacts and Calendar in OS X.
I found the following solution which appears to work from the Apple Support forums: http://tinyurl.com/ce2282d
It involves changing the service type to Generic and the Other server initiating protocols rather than HTTP/S and Normal protocols. It doesn't seem to affect any other service (OWA, ActiveSync etc.) that uses the same VIP on the KEMP. Anyone else had this issue and could it cause problems with the recommended settings for the KEMP LM's and Exchange 2010?
The issue I can see is that I can no longer configure the persistence options to Super HTTP and Source IP and I am sure this would cause issues from NAT'ed clients??