Troubleshoot ActiveSync on Exchange 2003

If things are not working - even after restarting and confirmed the port
forwards in the router are working for port 443 and 80 - and you have the
correct server details configured on the mobile device.

Follow these need to rebuild the Exchange ActiveSync setup.

First off reset the IIS Exchange setup:
http://support.microsoft.com/kb/883380
* including the exchange-oma vdir.

Then follow this to configure authenication settings for IIS\Exchange:
http://support.microsoft.com/default.aspx?kbid=817379&product=exch2003