The SAML 2.0 Login feature provides an application with the capability to act as a SAML 2.0 Relying Party, having users log in to the application by using their existing account at a SAML 2.0 Asserting Party (Okta, ADFS, etc).spring-doc.cn

Since 2009, support for relying parties has existed as an extension project. In 2019, the process began to port that into Spring Security proper. This process is similar to the one started in 2017 for Spring Security’s OAuth 2.0 support.spring-doc.cn