username format when binding to Active Directory?

[Bing Du <du_bing@xxxxxxxxxxx>]

Hello,

The following script returns 'LDAP bind failed...'.

<?php
echo "Connecting ...<br />";

$ldaprdn = "jsmith\@dept.some.edu";
$ldappass = "jsmithpass";

$ds=ldap_connect("ad.dept.some.edu");

if ($ds) {
   echo "Binding ...<br />";
   $r=ldap_bind($ds, $ldaprdn, $ldappass);

   if ($r) {
       echo "LDAP bind successful...<br />";
   } else {
       echo "LDAP bind failed...<br />";
   }
} else {
         echo "LDAP connection failed...<br />";
       }

?>

If I change $ldaprdn to be "CN=John 
Smith,OU=Users,OU=DEPT,DC=some,DC=edu", then bind returns 'LDAP bind 
successful...'.

However AD supports username to be in jsmith@xxxxxxxxxxxxx format 
because querying from the command line works:

% ldapsearch -h ad.dept.some.edu -s sub -b "dc=dept,dc=some,dc=edu" -x 
-D jsmith@xxxxxxxxxxxxx -W "samaccountname=jsmith"

Our AD only allows authenicated bindings.  We don't know user's DN 
before binding.  So anybody know how to make PHP allow 
$ldaprdn="jsmith\@dept.some.edu"?

Thanks in advance,

Bing

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