How To Obtain the Exchange Directory Hierarchy Programmatically

   typedef struct _BackupListNode
   {
            struct _BackupListNode __RPC_FAR *pnodeNext;
            struct _BackupListNode __RPC_FAR *pnodeChildren;
            RPC_SZ szName;
   } BackupListNode;


   //Program Start

   /*******************************************************************
   // This code returns a BackupListNode structure that
   // represents the Organizational Hierarchy of Exchange.
   //******************************************************************

   #define UNICODE
   #define _UNICODE
   #include <SADAPI.H> //this header is included in the Platform SDK
   #include <TCHAR.h>

   void main(void)
   {
      BackupListNode*      pNode           =    NULL;
      RPC_SC               sc;
      PRPCBINDINFO         pBindInfo       =    new RPCBINDINFO;
      TCHAR                wszServer[256];

      ZeroMemory(pBindInfo, sizeof(RPCBINDINFO));

      // Replace "ExchangeServer" with the server name you
      // want to get the hierarchy from
      _tcscpy(wszServer, L"ExchangeServer");

      sc = SAD_ScBind(pBindInfo, wszServer);

      if (sc != ERROR_SUCCESS)   return;

      sc = SAD_ScGetBackupListNodeW(pBindInfo->wszServer, &pNode);

      // pNode will contain your entire hierarchy as seen by
      // the Server (wszServer)

      SAD_FreeBackupListNode(pNode);

      SAD_Unbind(pBindInfo);

      delete pBindInfo;
   }