Common for both municipal and regional users is that:
The Infrastructure Authorization Service (AS) redirects a login as SAML AuthNRequest to SEB
SEB forwards the SAML AuthNRequest to municipal and regional Identity Providers (IdP), respectively.
As apparent in Federated Authentication and Authorization for Municipal Users and Federated Authentication and Authorization for Regional Users there are differences in what systems are involved.
What is returned to SEB and the Infrastructure AS is a SAML AuthNResponse conforming to OIO BPP