I am trying to create a new user in AD and MailBox for this user in Exchange server using CDOEXM  ,

User is getting created successfully but when I try to create mail box I am getting the error as

There is no such object on the server. (Exception from HRESULT: 0x80072030) 

I am using code given under article

http://support.microsoft.com/kb/313114

we have AD and Exchange server installed on two different servers, 

please help me in this regard,

Thanks in advance, 

This typically means that you have an invalid LDAP path somewhere. When does this error occur, at what statement in your code?

Thanks for replying I am including the code for your reference please check and let me know the cause for error

sFirstName="abc";
  sLastName="def";
  sMailId="abc.def"
  sPassword="abc1234";
  strFullName=sFirstName+" "+sLastName;
            string domain = "LDAP://192.168.5.62/OU=newusers,DC=xxx,DC=com";           
            DirectoryEntry dirEntry = new DirectoryEntry(domain, "username", "password", AuthenticationTypes.Secure);
            sAccountName = sFirstName + "." + sLastName;
            DirectoryEntry newUser = dirEntry.Children.Add("CN=" + sMailId, "user");           
            newUser.Properties["givenname"].Add(strFirstname);
            newUser.Properties["sn"].Add(strLastName);           
            string strFullName = textInfo.ToTitleCase(sMailId);
            newUser.Properties["displayName"].Add(strFullName);
            newUser.Properties["SAMAccountName"].Add(sAccountName);           
            newUser.Properties["userPrincipalName"].Add(sAccountName+"@aaa.com");
            newUser.Properties["submissionContLength"].Add(5500);                 
            newUser.Properties["delivContLength"].Add(5500);              
            newUser.CommitChanges();
            EnableUserAccount(newUser);
            newUser.Invoke("SetPassword", new object[] { sPassword });
            newUser.CommitChanges();
            System.Threading.Thread.Sleep(10000);    
            //Till here working fine...
            string homeMDB = "CN=Mailbox Store(MAILBOX),CN=First Storage Group,CN=InformationStore,CN=MAILBOX,CN=Servers,CN=First Administrative Group,CN=Administrative Groups,CN=xxxxx,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=xxxx,DC=com";          
            CDOEXMailBox = (IMailboxStore)newUser.NativeObject;                     
            CDOEXMailBox.CreateMailbox(homeMDB);//Getting error at this stage
            newUser.CommitChanges();
           
            192.168.5.62=Server where Activer Directory is installed
            MAILBOX(192.168.5.60)=Server where Exchange server is installed..my application also hosted on this server

please note that we have installed Active Directory and Exchange server installed on two different machines.

Hi there, sorry for the delay in getting back to you. Did you manage to solve this yet?