There is a New Self-Reset Password Feature.
With this new feature, Portal users will be able to recover forgotten passwords by correctly choosing eight Dislike and Like security images and having a valid email address
When this new feature is enabled, all Portal Users will be required update Security Preferences.
You can click here to view documentation on How to Update your Security Preferences once the feature has been enabled.
You can click here to view documentation on How to use the Self-Reset Password Feature once it is enabled.