Resetting User Password in Openfire is not working

Hi Experts,

When I tried to change Openfire User passwords from Users/Group it shows error message like "Error Meeting Password. This operation is not supported with current Configuration"

This is happing for all users. Opefire Version - 3.9.3

What seetings should I change to enable password Change. Also I have login with Admin account.

Thanks,

Pramod