How can I allow the user to change their own password

How can I allow the user to change their own password?

Change the setting for  Users can change their own password in the User Administration Settings tab in Framework details.

This option is only available if  the option Users sign on locally to use the Framework has been selected.

There is no Framework setting to allow the user to change their own password.

A way of achieving this would be to change the User Sign on IIP (default is function UFU0001) to make the Framework check against your own user profile/password files. Then write an ordinary command handler that interfaces with your own user profile/password files and allows the user to change their password.