MSAD Authentication using Spring LDAP - email as userid

gistfile1.java

 LdapContextSource cs = new LdapContextSource();
              cs.setUrl("ldap://127.0.0.1:389");
              cs.setBase("OU=XX,DC=YY,DC=com");
              cs.setUserDn("CN=appCN,OU=XX,DC=YY,DC=com");
              cs.setPassword("appPassword");
              cs.afterPropertiesSet();
              LdapTemplate lt = new LdapTemplate(cs);
              AndFilter filter = new AndFilter();
           filter.and(new EqualsFilter("mail", "userEmail@somedomain"));
           System.out.println(lt.authenticate(DistinguishedName.EMPTY_PATH, filter.toString(), userPassword)); //true means valid login