[keycloak-user] MultiTenant system with SSO for selected users

Hi Team, I have a unique requirement in our project to solve. Out project is multitenant based, we need to enable SSO only for specific tenant only. And for remaining user's wanted to used old form based login it self. We are planning to use Keycloak for identity brokering to connect with customers IDP. Can any one guide, how can i solve this problem ? -- Kind Regards, Babji Kundateeri.