AD user password reset from roundcube password plugin

[ronsonblossom]

I configured password plugin to reset AD integreated roundcube user password. But when resetting password, roundcube webmail show "Successfully saved" and log file says "Password changed for user".

But it is not changed actually. What could be the issue?
Is there a way to see the query send from rouncube to AD server for resetting the password ?

My password config file hardcoded section is below:
+=======================+
$rcmail_config['password_ldap_host'] = "10.0.0.4";
$rcmail_config['password_ldap_port'] = "389";
$rcmail_config['password_ldap_starttls'] = false;
$rcmail_config['password_ldap_version'] = "3";
$rcmail_config['password_ldap_basedn'] = "OU=WebMailUsers,DC=domain2,DC=domain2,DC=loc";
$rcmail_config['password_ldap_method'] = "admin";
$rcmail_config['password_ldap_adminDN'] = "mailuser1";
$rcmail_config['password_ldap_adminPW'] = "xxx";
$rcmail_config['password_ldap_searchDN'] = 'mailuser1';
$rcmail_config['password_ldap_searchPW'] = 'xxx';
$rcmail_config['password_ldap_search_base'] = 'OU=WebMailUsers,DC=domain2,DC=domain2,DC=loc;
$rcmail_config['password_ldap_search_filter'] = '(mail=%login)';
$rcmail_config['password_ldap_encodage'] = "crypt";
$rcmail_config['password_ldap_pwattr'] = "userPassword";
$rcmail_config['password_ldap_force_replace'] = true;
$rcmail_config['password_ldap_lchattr'] = "";
$rcmail_config['password_ldap_samba_pwattr'] = '';
$rcmail_config['password_ldap_samba_lchattr'] = '';
+=======================+

Can you see anything I missed ?

Many Thanks,
Ronson