Ejabberd and PAM password change

Hello everybody,

I have a working enterprise ejabberd server that authenticate using PAM.
It only accepts already known users and filter per PAM groups.

I would like to know if it is possible to let ejabberd update the PAM password.
Currently, if I do change the password via XMPP, it goes to a local password.DCD file, I want it to update the PAM password instead.

Maybe some tips and tricks with the {pam_service, "ejabberd"} ? Maybe should I do a very specific PAM configuration for ejabberd ? Currently, it's as following :

# Standard behaviour for ejabberd.
auth required pam_listfile.so onerr=fail item=group sense=allow file=/etc/ejabberd/pam.group

# Standard blurb.
@include common-account
@include common-session

@include common-auth
auth required pam_shells.so

Thanks in advance for your help,