Hi All,
Someone help me to fix my issue, I spend many hours to figure out enabling "Email-Based Identity Verification Option" but nothing helped.

1. Cannot change standard user profile called "System Administrator" so I cloned it but cannot assign my user to the newly cloned profile. I am using developer edition, is that cause?
2. Created new "Permission Set" by going Setup|Users|Permission sets and checked "Email-Based Identity Verification Option" under System Permissions. and Assigned my user

Thanks!