We have a web appliaction configured with FBA (sql and LDAP) and users are authenticated using their username. Now we have a requirement to authenticate users using email id instead of username. we have one solution also that requires to change entry
in web.config file for membership provider but it doesn't suffice as it works only for newly added users and not existing ones and site is already in production environment with large user base. Any suggestions to meet this requirement?
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