I am having an issue with this working on a 2003 R2 SBS. Everything seems to be setup correctly, but no one in the company can sync. I've went through all of these troubleshooting steps (which were very helpful) and haven't come up with anything. One thing I have noticed is that I can't access the AutdState (or Autd-State).xml file from the server.
I have had one successful activesync documented and the IIS logs showed the GET requests at the documented time, but why this one time, and not all of the time. The IIS logs had the successful GET commands in this format: GET /exchange-oma/user/-FlatUrlSpace-/
All devices say that they are sychronized, but receive no data. They connect and go through the motions of ActiveSync, but the devices do not update with the data. Any ideas?