December, 2008

  • Akash Blogging......

    HOW TO: Get details about a Exchange User in Outlook 2007 & Outlook 2003


    I recently came across an issue where I needed to get the details about Exchange User from within an Outlook Add-in. Below is a screen shot of the details I am referring to.


    In Outlook 2007 its very simple, just use the ExchangeUser Object and you will get the details. More details can be found in the article below:

    ExchangeUser Object Members

    Below is sample C# code that shows how to use the ExchangeUser Object:

    using System;
    using System.Collections.Generic;
    using System.Text;
    using Outlook = Microsoft.Office.Interop.Outlook;
    namespace GetUserDetails
        class Program
            static void Main(string[] args)
                Outlook.Application oApp;
                Outlook.NameSpace oNameSpace;
                Outlook.SelectNamesDialog oSNDialog;
                Outlook.AddressEntry oAEntry;
                Outlook.ExchangeUser oEUser;
                oApp = new Outlook.Application();
                oNameSpace = oApp.GetNamespace("MAPI");
                oNameSpace.Logon(null, null, true, false);  
                oSNDialog = oNameSpace.GetSelectNamesDialog();
                oSNDialog.NumberOfRecipientSelectors = Outlook.OlRecipientSelectors.olShowTo;
                oSNDialog.Caption = "Select User";
                oSNDialog.ToLabel = "User Name";
                oSNDialog.ShowOnlyInitialAddressList = true;
                oSNDialog.AllowMultipleSelection = false;
                 foreach(Outlook.Recipient oRecipient in oSNDialog.Recipients)
                    oAEntry = oRecipient.AddressEntry;
                    if(oAEntry.AddressEntryUserType == Outlook.OlAddressEntryUserType.olExchangeUserAddressEntry
                        || oAEntry.AddressEntryUserType == Outlook.OlAddressEntryUserType.olExchangeRemoteUserAddressEntry)
                        oEUser = oAEntry.GetExchangeUser();
                        oEUser = null;
                    oAEntry = null;
                oNameSpace = null;

    However in Outlook 2003 the ExchangeUser Object is not there. The only way to do it is query the AD based on the AddressEntry.Address(LegacyexchangeDN). Below is sample C# code that uses the DirectoryServices namespace to query the AD based on LegacyexchangeDN.

    using System;
    using System.Collections.Generic;
    using System.Text;
    using System.DirectoryServices;
    namespace GetUserDetailsBasedOnLegacyDN
        class Program
            static void Main(string[] args)
                //This is the legacy exchange DN
                string LEDN = "/O=ms/OU=east/cn=Recipients/cn=whatever";
                DirectoryEntry objRootDSE = new DirectoryEntry("GC://RootDSE");
                String strRoot = objRootDSE.Properties["rootDomainNamingContext"].Value.ToString();
                DirectoryEntry objRoot = new DirectoryEntry("GC://" + strRoot);
                DirectorySearcher objSrch = new DirectorySearcher(objRoot);
                objSrch.Filter = "(&(objectClass=user)(objectCategory=person)(legacyExchangeDN= " + LEDN + "))";
                objSrch.SearchScope = SearchScope.Subtree;
                DirectoryEntry objUser = new DirectoryEntry();
                objUser = objSrch.FindOne().GetDirectoryEntry();
                Console.WriteLine("Mobile:" + objUser.Properties["mobile"].Value);
                Console.WriteLine("Number:" + objUser.Properties["telephoneNumber"].Value);
                Console.WriteLine("Department:" + objUser.Properties["department"].Value);
                objUser = null;
                objSrch = null;
                objRoot = null;
                objRootDSE = null;

    Note: I am not an AD expert, you might need to tweak the code depending on your environment and your needs.
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