We are creating a portal for external users, and would like to have them login with Azure B2C.
The people we are inviting are Contacts in CRM, so there email is already in CRM.
The person is able to login to AzureB2C, but when they get to the portal, on the "Register your external account" page, and enter their email, they get the message "The Email [email] is already taken"
It seems that the Portal is expecting to create a new contact for the new Portal user, but we want existing contacts to be able to register for the portal.
Hope this makes sense. Any help is appreciated.