How To Create a Mailbox Using DAPI

    #include <windows.h>
    #include <stdio.h>
    #include <string.h>
    #include <lmcons.h>
    #include <dapi.h>

    void CreateMB(DAPI_HANDLE hDAPISession, char* pszComputerName,
                  char* pszAlias, char* pszNTAcct);

    void ReportDAPIEvent(DAPI_EVENT* pDAPIEvent);

    void main(int argc, char* argv[])
    {
       DAPI_HANDLE hDAPISession;
       DAPI_EVENT* pDAPIEvent = NULL;
       DAPI_PARMS DAPIParms = {0};
       char szAccount[UNLEN + MAX_COMPUTERNAME_LENGTH + 2];
       DWORD dwAccountLength = UNLEN + MAX_COMPUTERNAME_LENGTH + 1;

       if (4 > argc) {
         printf("\nDAPITest Domain ExchangeServerName DN OwnerNTAcct");
         printf("\n      DN = ");
         printf("\"/O=org/OU=site/CN=RECIPIENTS/CN=AliasName\"");
         return;
       }

       strcpy(szAccount,argv[1]);
       strcat(szAccount,"\\");
       strcat(szAccount,argv[4]);

       printf("\nExchange Server: %s", argv[2]);
       printf("\nDN \"%s\"\nNTAcct: %s", argv[3], szAccount);

       // Start DAPI for this session
       // Initialize the DAPI Parms structure and
       // the DAPI operation session
       DAPIParms.dwDAPISignature = DAPI_SIGNATURE;
       DAPIParms.dwFlags = DAPI_EVENT_ALL |
               DAPI_MODIFY_REPLACE_PROPERTIES | DAPI_RESTRICT_ACCESS ;
       DAPIParms.pszDSAName = argv[2];
       DAPIParms.pszBasePoint = NULL;
       DAPIParms.pszContainer = NULL;
       DAPIParms.pszNTDomain = argv[1];
       DAPIParms.pszCreateTemplate = NULL;
       DAPIParms.pAttributes = NULL;

       pDAPIEvent = DAPIStart(&hDAPISession, &DAPIParms);

       if(pDAPIEvent)
       {
         // ReportDAPIEvent(pDAPIEvent);
         printf("\nDAPIStart() ERROR %08x - check app eventlog",
                pDAPIEvent->dwDAPIError);
         ReportDAPIEvent(pDAPIEvent);
         //DAPIFreeMemory(pDAPIEvent);
       }
       else
         printf("\nDAPIStart() was successful");

       // argv[2] is the server; argv[3] is the DN
       CreateMB(hDAPISession, argv[2], argv[3], szAccount);

       DAPIEnd(&hDAPISession);

       printf("\nEND PROGRAM");
    }

    void CreateMB(DAPI_HANDLE hDAPISession, char* pszComputerName,
                  char* pszAlias, char* pszNTAcct)
    {
      DAPI_EVENT* pDAPIEvent = NULL;
      DAPI_ENTRY Attributes;
      DAPI_ENTRY Values;
      ATT_VALUE AttName[5];
      ATT_VALUE AttValue[5];

      printf("\nIN CreateMB()");

      //set up the account information to create
      AttName[0].DapiType = DAPI_STRING8;
      AttName[0].Value.pszValue = "Obj-Class";
      AttName[0].size = strlen(AttName[0].Value.pszValue);
      AttName[0].pNextValue = NULL;

      AttName[1].DapiType = DAPI_STRING8;
      AttName[1].Value.pszValue = "Common-Name";
      AttName[1].size = strlen(AttName[1].Value.pszValue);
      AttName[1].pNextValue = NULL;

      AttName[2].DapiType = DAPI_STRING8;
      AttName[2].Value.pszValue = "Home-Server";
      AttName[2].size = strlen(AttName[2].Value.pszValue);
      AttName[2].pNextValue = NULL;

      AttName[3].DapiType = DAPI_STRING8;
      AttName[3].Value.pszValue = "Assoc-NT-Account";
      AttName[3].size = strlen(AttName[3].Value.pszValue);
      AttName[3].pNextValue = NULL;

      AttName[4].DapiType = DAPI_STRING8;
      AttName[4].Value.pszValue = "Display Name";
      AttName[4].size = strlen(AttName[4].Value.pszValue);
      AttName[4].pNextValue = NULL;

      Attributes.unAttributes = 5;                  //# of attributes
      Attributes.ulEvalTag = TEXT_VALUE_ARRAY;      //Value Type
      Attributes.rgEntryValues = (ATT_VALUE*)&AttName;

      AttValue[0].DapiType = DAPI_STRING8;
      AttValue[0].Value.pszValue = "Mailbox";
      AttValue[0].size = strlen(AttValue[0].Value.pszValue);
      AttValue[0].pNextValue = NULL;

      printf("\nCommon-Name: \"%s\"",pszAlias);

      AttValue[1].DapiType = DAPI_STRING8;
      AttValue[1].Value.pszValue = pszAlias;
      AttValue[1].size = strlen(AttValue[1].Value.pszValue);
      AttValue[1].pNextValue = NULL;

      printf("\nHome Server: %s", pszComputerName);

      AttValue[2].DapiType = DAPI_STRING8;
      AttValue[2].Value.pszValue = pszComputerName;
      AttValue[2].size = strlen(AttValue[2].Value.pszValue);
      AttValue[2].pNextValue = NULL;

      printf("\nAccount: %s",pszNTAcct);

      AttValue[3].DapiType = DAPI_STRING8;
      AttValue[3].Value.pszValue = pszNTAcct;
      AttValue[3].size = strlen(AttValue[3].Value.pszValue);
      AttValue[3].pNextValue = NULL;

      // TODO: Change "Johnny Quest" to be the text you want for
      // the display name on the mailbox.
      AttValue[4].DapiType = DAPI_STRING8;
      AttValue[4].Value.pszValue = "Jonny Quest";
      AttValue[4].size = strlen(AttValue[4].Value.pszValue);
      AttValue[4].pNextValue = NULL;

      Values.unAttributes = 5;                        //# of attributes
      Values.ulEvalTag = TEXT_VALUE_ARRAY;            //Value Type
      Values.rgEntryValues = (ATT_VALUE*)&AttValue;

      // Create the new Exchange mailbox
      pDAPIEvent = DAPIWrite(hDAPISession, DAPI_WRITE_CREATE,
                             &Attributes, &Values, NULL,
                             NULL, NULL);

      if(pDAPIEvent)
      {
        // create FAILED
        printf("\nDAPIWrite ERROR %08x check app eventlog",
               pDAPIEvent->dwDAPIError);
        ReportDAPIEvent(pDAPIEvent);
        //       DAPIFreeMemory(pDAPIEvent);
      }
      else
        printf("\nDAPIWrite() was successful");

    }

    void ReportDAPIEvent(DAPI_EVENT* pDAPIEvent)
    {
      HANDLE hDAPIEventSource =
           RegisterEventSource(NULL, TEXT("MSExchangeDSImp"));

      ReportEvent(
         hDAPIEventSource, (WORD)EVENTLOG_ERROR_TYPE, 0,
         pDAPIEvent->dwDAPIError, NULL, (WORD)pDAPIEvent->unSubst,
         0, (LPCSTR *)pDAPIEvent->rgpszSubst, NULL);

      DAPIFreeMemory(pDAPIEvent);

      DeregisterEventSource(hDAPIEventSource);
    }