We are building a SPA in react. For users to sign in we are using Azure AD B2C as some of our users in the Azure Tenant. But we want to expand the user base and provide access to another set of users that another Idp manages. So We have decided to add the external Idp to our Azure B2C and now user see both options on the login screen.
There is a third party web application that the external Idp authenticates. So If we provide a link to that applications on our SPA, and if the user is signed into our SPA using the external Idp via Azure AD and when the user clicks on that link, we would like SSO to happen to that site and bypass the sign in feature.
Is this flow possible?