I would like to know that Searchguard SAML Auth support IDP discovery service. Discovery service is where user able to select IDP from the list. [https://wiki.shibboleth.net/confluence/display/SHIB2/DiscoveryService] .e.g. https://edugate.heanet.ie/Whoami/Login . At the moment I am using proxy authentication [apache-shibboleth-sp-kibana] on Kibana.
For any further information please do let me know.