The password much be changed after initial use (or after a password reset by an administrator)

Is it possible when  a new user is created, he should be forced to change his password upon first login? and also if a password is reset by an admin for a user?

Please let me know how we can achieve this?

thanks alot!

There's nothing built in to do this, but it has been requested before, so i'm considering it for a future version.  I'd say it would need a custom login page to handle this functionality.