I am trying to configure the Enterprise OpenID connection with our customer’s Auth Server, and it requires us to add a custom param into the jwt token request from the backchannel. So is it a way to add some custom header and body before the jwt token request call?
As far as I’m aware I don’t believe this would be possible for the OIDC enterprise connection. There’s also support for custom OAuth 2.0 connection which may give you a bit more flexibility, but even with those I believe you would only be able to send additional HTTP headers (Connect Apps to Generic OAuth2 Authorization Servers) to the token endpoint. In other words, sending a custom parameter in the request body for the token endpoint may not be currently feasible.