ActiveSync 0x80830003 Support Code
With Exchange 2003 SP2 &
Windows Mobile 5

If you have the following symptoms:

1. you can sync successfully over the air with your pre mobile 5 device and Exchange 2003 with any service pack level
    
2. as soon as you upgrade to a mobile 5 device with no server changes except to allow direct push you begin receiving support code 0x80830003 after looking for changes when syncing if the server has SP2 (requred for direct push)
    
3. if you uninstall SP2 or attempt to connect to a different server running SP1 or no SP you can sync with no errors
    
4. http://support.microsoft.com/default.aspx/kb/830563 does not help or refers to items you do not have
    
5. you have been told by support reps with your wireless provider to insure that the IIS Microsoft-Server-Activesync virtual directory is set to ignore client certificates, but it is and if its not you get a different error

then you are where we were.  We were syncing error free with a Motorola MPX220 and AT&T, but our new HTC 8525 gave us support code 0x80830003 despite proper server configurations and the use of a non self-signed certificate.  After weeks of trying in vain to find a solution we returned the new phone and returned to the old one.

Recently the MPX220 developed a battery issue. Determined to have a phone with all the features we want including working over the air syncing we got a 2nd 8525 and reopened the issue.  Finally  we located the fix.  To eliminate your support code 0x80830003 follow these steps:

1. On the Exchange server stop the IIS Admin service and the World Wide Web Publishing service.
    
2. Copy C:\Windows\System32\inetsrv\MetaBase.xml to another location.
    
3. Open C:\Windows\System32\inetsrv\MetaBase.xml in notepad.
    
4. Find the line that reads
   <IIsWebVirtualDirLocation ="/LM/W3SVC/1/ROOT/Microsoft-Server-Activesync"
    
5. Underneath it find the next set of lines that read
   
   DoDynamicCompression="TRUE"
   DoStaticCompression="TRUE"
   
   and change them to
   
   DoDynamicCompression="FALSE"
   DoStaticCompression="FALSE"
    
6. Save the file.
    
7. Restart the services you stopped above and any dependent services that were stopped (I.E. Microsoft Exchange POP3).

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