Well, if you knew all that, how come you've come to the bisare idea that exporting and recreating a user would solve anything?

As an OCP you must know that passord management is strictly related to profiles, not to particular users. You can't create user with or without something you called "PASSWORD EXPIRE" option. You can only control whether password of a user is subject to expiration or not by the profile that is assigned to the user. So if you are not allowed to alter/create profiles, your only option is to explain to your users to stop complaining about that password isue, because there is nothing in this world you can do abot that. No droping and recreating user will help you here, not even close!