Typically LiveCycle integrates with an existing Identity Management System or LDAP and authenticates users against that external system. We do support locally created and managed users and you can change those passwords through the LC Admin UI. However if you are using LDAP etc then you need to manage users' passwords with that system.
We have an Active Directory but being a user, what if I do not want to merge the users of ALC with my existing AD?
In this case, can't we provide a very basic functionality of changing passwords to our users on their own?