Check the box “Show password to user” if you want to show password on the site page when user resets it.
If you define page public url, external users will be able to reset password and receive a new one with using this publiс url.
Active Directory authentication enables users to enter the same login and password to logon to the SharePoint site as for logging to Windows system. In this case automatic SharePoint authentication can be adjusted.
There are two options for password reset: security questions and email request. See the sections below.