Complete guide to configuring SAML SSO with Spring Security 6 — metadata-location setup, multi-IdP support, custom attribute mapping, and troubleshooting signature validation errors. Companion repo with Docker Compose and Keycloak included.

Configuring SAML Login with Spring Security: metadata-location and Relying Party Setup
Complete guide to configuring SAML login with Spring Security — including metadata-location setup, spring.security.saml2.relyingparty.registration configuration, certificate management, and troubleshooting common SAML errors.