Hello Kunjan,
SharePoint does not manage authentication, it uses Windows authentication via Active Directory whereas Claims based authentication uses ASP.net. None of the users on SharePoint are managed by SharePoint, it is always managed
by an outside source. Active directory has built in functionality that enables you to manage password reset on login. If you are set on using FBA, then you have to use a custom solution outside of the built in functionality.
-Bryce
