How to get a user's e-mail address from Active Directory?

Question

I am trying to get a user's email address in AD without success.

String account = userAccount.Replace(@"Domain\", ""); DirectoryEntry entry = new DirectoryEntry();  try {     DirectorySearcher search = new DirectorySearcher(entry);      search.PropertiesToLoad.Add("mail");  // e-mail addressead      SearchResult result = search.FindOne();     if (result != null) {         return result.Properties["mail"][0].ToString();     } else {         return "Unknown User";     } } catch (Exception ex) {     return ex.Message; } 

Can anyone see the issue or point in the right direction?

Answer 1

Disclaimer: This code doesn't search for a single exact match, so for domain\j_doe it may return domain\j_doe_from_external_department's email address if such similarly named account also exists. If such behaviour is undesirable, then either use a samAccountName filter intead of an anr one used below or filter the results additionally.

I have used this code successfully (where "account" is the user logon name without the domain (domain\account):

// get a DirectorySearcher object DirectorySearcher search = new DirectorySearcher(entry);  // specify the search filter search.Filter = "(&(objectClass=user)(anr=" + account + "))";  // specify which property values to return in the search search.PropertiesToLoad.Add("givenName");   // first name search.PropertiesToLoad.Add("sn");          // last name search.PropertiesToLoad.Add("mail");        // smtp mail address  // perform the search SearchResult result = search.FindOne();