4.1.4 Phase 4: Client Performs FolderSync by Using the Final PolicyKey

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The client uses the "final" policy key obtained in phase 3 in the header of the FolderSync command request.

Request 

 POST /Microsoft-Server-ActiveSync?User=deviceuser&DeviceId=6F24CAD599A5BF1A690246B8C68FAE8D&DeviceType=PocketPC&Cmd=FolderSync HTTP/1.1
 Accept-Language: en-us
 MS-ASProtocolVersion: 14.0
 Content-Type: application/vnd.ms-sync.wbxml
 X-MS-PolicyKey: 3942919513
 User-Agent: ASOM
 Host: EXCH-B-003
  
 <?xml version="1.0" encoding="utf-8"?>
 <FolderSync xmlns="FolderHierarchy:">
      <SyncKey>0</SyncKey>
 </FolderSync>