What setting ensures that a user cannot change their password in a CANES user account?

The setting that ensures a user cannot change their password is the option that directly limits the user's ability to modify their own password settings. When this option is activated, it places a restriction on the user's permissions, thereby preventing any changes to their password.

This is particularly useful in environments where password security is paramount, and administrators wish to maintain control over password management. By designating this setting, it ensures that only authorized personnel can make password changes, thus mitigating potential security risks associated with users changing passwords to weak or easily remembered variations.

The other options relate to password policies that do not directly influence the user's ability to change their password. For instance, policies about password expiration or mandatory changes do not provide the same level of restriction on the user's potential to modify their password if they choose.