Portal version jboss-portal-2.6.2.GA

I successfully connected the portal identity mgmt to the ActiveDirectory with ssl connection (important, AD does not accept password changing without a ssl connection).
When user goes to his profile, he can change some information (ex. email address) and changing reflect to AD.
When user tries to change password, the operation seems to have success but it doesn't. The password is unchanged.

as you know, it is possible to change the LDAP user password in AD with the portal function?