LDAP Windows 2000 Login name

Question

Hi !
I use the following code to authenticate users against a Windows 2000 Active Directory.
My problem is that I have to pass the user name "John Doe" instead of the login name "johndoe" as a parameter.
How can I achive this ? I know, I have to use a fully qualified name like "johndoe@intranet" but ... ???
Thankx in advance, Gurus !
package org.mp.intern;
import java.util.*;
import javax.naming.*;
import javax.naming.directory.*;
public class LDAPTest
     public void authenticate(String server,String domain,String name,String pwd) throws Exception
          Hashtable env = new Hashtable();
          env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
          env.put(Context.PROVIDER_URL, "ldap://" + server + ":389/dc=" + domain);
          env.put(Context.SECURITY_AUTHENTICATION, "simple");
          env.put(Context.SECURITY_PRINCIPAL, "cn=" + name + ",cn=users,dc=" + domain);
          env.put(Context.SECURITY_CREDENTIALS, pwd);
          DirContext ctx = new InitialDirContext(env);
          ctx.close();
     public static void main(String[] args)
          LDAPTest p = new LDAPTest();
          try
               // I have to do this ..
               p.authenticate("pdc","intranet","John Doe","mypassword");
               // ... but I want to do this
               p.authenticate("pdc","intranet","johndoe@intranet","mypassword");
          catch(Exception ex)
               ex.printStackTrace();
}

Answer 1

Ok,
have located the solution on my own.
simply pass the login name plus the domain name as the SECURITY_PRINCIPAL, for example :
env.put(Context.SECURITY_PRINCIPAL,userName + "@" + domain);
Not everything is complicated in a heterogeneus world :-))
cya