[keycloak-user] Custom Email Attribute

Hi, There are some users from department in my company that uses the one SAME EMAIL for all its users, eventhough they all have their own user IDs. But Keycloak doesn't allow for different users to have the same email address. Is there any workaround for this? Lets say if I create a custom email attribute that connects to the mail LDAP attribute, how do I make Keycloak to recognise this custom email attribute as THE EMAIL ATTRIBUTE? Regards, Kunal