Mail for Exchange client embedded on Nokia E75 and E72 phone does have a problem with ActiveSync protocol implementation. When trying to sync more than one email folder (ie. Inbox and Junk Email) the client shows an error "Unable to sync. Contact system administrator.". I've done thorough testing with Kerio MailServer (both ActiveSync 2.5 and 12.0) with no success. It looks there are "hacks" in the client for Exchange as it seems to work fine there.
Interesting thing is that regular MailForExchange 2.9 client on other phones works with no issues.
Can any developer shed a light on this?
Is there any way how to debug MfE client? It does not write any error to the log_admin.txt file and there is no debug file at all.