We have a custom portal in which there are links to some salesforce pages which are part of a customer community.
Users have to be logged into the custom portal in order to access salesforce(custom portal has LDAP authentication). We have used SAML to implement SSO between the custom portal and the salesforce customer community.
My Question is, in this case when users are logged in and when they click any of these links(pages) of salesforce customer community will the SSO be identity provider initiated(from the custom portal side?) or will be initiated by service provider(salesforce?).
Custom Portal is the Identity Provider and salesforce is the service provider.
This could a basic foundation question but i keep getting confused between the both.
Any help or clarity on whats service provider initiated vs whats identity provider initiated would be helpful