Exchange Account in Mail - lot's of email don't show up
Hi
I have some confusing experiences Mail with my exchange email account (hosted as an exchange account by the German hosting Provider 1&1) - which worked fine for a long time.
Recently I experienced the following effects:
Email don't show. They are not lost. If I use a web browser to access my account with the Outlook Web App, all email are there. Mail shows always the most recent emails (from about one month) but not more.
If I switch between different email accounts in Mail (I also manage imap accounts and my .me account in Mail) and then back to the exchange account all or most email don't show anymore. If I close and reopen Mail the most recent emails show up again.
It's not a matter of disk space (about 400 GB free), I did the usual stuff like disk repair and check permissions.
I'm thankful for any ideas.
Best
macangelo7
Apple Mail-OTHER, OS X Mountain Lion (10.8.5)