LDAP authentication module not working in xampp When i enabled LDAP module for drupal 7 then always shows error 
No LDAP PHP Extension is loaded for PHP, so LDAP will not work properly.
even  after un comment extension=php_ldap.dll from my php.ini, it is not working.i restart apache and php_ldap.dll is also in php extensions.
Yes i have sorted out this issue.
In the \xampp\php folder you will find this file:libsasl.dll
Copy it into the \xampp\apache\bin folder.
Now try and start Apache again.It should now start.Now it is working.