SSO using OAM, supporting multiful authentication ways.

Hello Experts,

I'm using WebCenter Portal 11.1.1.8 configured with OAM for SSO.

Btw, SSO requirement is supporting multiway for authentication like using id, email and celephone no.

So, for the requirement, OAM create 3 security providers in OAM weblogic domain.

In case of using default configuration for OAM SSO configuration in WebCenter Portal domain (adding OAMAsserter and a security provider for the LDAP for Identity store)...SSO was failed.

So, as workaround,  we created same security providers in WebCenter Portal domain and then SSO worked well.

My first question is following.

- Having same security providers with OAM weblogic domain in WebCenter Portal domain is right or mandatory configuration?