I am working on a scenario in Pega 8.8.5 with the following setup:
    • Anonymous Authentication Service: AnonymousAuth
    • External OpenID Authentication Service: ExternalOpenID
    • Internal OpenID Authentication Service: InternalOpenID
    • Portals: ExternalPortal (external users), InternalPortal (internal users)
Requirement:
When a user accesses the anonymous portal (AnonymousAuth) and clicks the Login button, they should be automatically redirected to the external OpenID service (ExternalOpenID) and land in the ExternalPortal. Internal users should use InternalOpenID → InternalPortal.
Current Behavior / Issue:
    • After clicking the login button from the anonymous portal, Pega :
The pyDisplayAuthScreenSelector page is displayed, showing both OpenID services.
    • Post-Authentication Activity and Redirect URL configurations are not working as expected.
Question:
    • How can I bypass pyDisplayAuthScreenSelector and have the anonymous login button directly invoke the correct OpenID Authentication Service and redirect to the assigned portal?
    
Any guidance, sample configurations, or best practices for handling Anonymous → OpenID authentication in Pega 8.8.5 would be greatly appreciated.