The next version will check the password only in the LDAP server(for LDAP Auth option).
Nvertheless, I suggest you to keep Active Directory and XOOPS password synchronised for better maintenance.
XoopsPro
if (!extension_loaded('ldap')) {
$this->setErrors(0, 'ldap extension not loaded'); return $authenticated; }
$ldapbind = ldap_bind($ds,"MERCIER Benoit(DIGIT)","nicNAC22");