OIDC SSL certs not being sent as part of header


Have setup keycloak behind nginx and have integrated with a third party application. Post login from third party app the request for validating code is reaching keycloak. post validating the respone from keycloak to third party application fails as the app is expecting to send certs shared via header but keycloak oidc isnt sending them.

Have followed most of the instrucitons to add SSL-realms, x509 lookup in standalone.XML but its continues to fail.

Can someone plz share any other config that needs to be done to make this work