I have a Keycloak server that is functioning as my identity provider, using X.509 authentication to the users in my realm. I have successfully configured this as an external identity provider (SAML 2.0) to an ADFS server since I'm trying to allow access to an IIS-hosted web application through Web Application Proxy. My current effort is to configure the claim rules to map the incoming SAML assertion attributes to internal Active Directory user accounts, so that ADFS/WAP can perform integrated Windows authentication internally once the external authentication is mapped to an internal user. Most of the search results I've found address the exact opposite, assuming that I've authenticated with ADFS and need to map LDAP attributes to an outgoing claim. Can anyone provide help, or direct me to a good source?