Well, we actually are an ISP offering Hosted Exchange services on our own Exchange 2007 and 2010 plattforms. And I am absoltuly sure, I configured everything proberly. I even tried it with auto-discovery which usually works find with each and every equipment - but not with this solution.
This is what I get with leaving the field empty for autodiscovery:
[5] 2013/01/29 16:58:52: Activesync: Start discovery.
[5] 2013/01/29 16:58:52: Activesync: Error code = 403
[5] 2013/01/29 16:58:52: Activesync: Start discovery.
[5] 2013/01/29 16:58:52: Activesync: OK
[5] 2013/01/29 16:58:52: Activesync: Start syncing.
However, it dies not get any contacts at all.
Regards,
Peter