Simple and clear explanation. I’m facing a challenge in my SAML SSO implementation. Can you please help on it. In my case Spring boot is SP and Ping Federation is IDP server and Angular is web client. while accessing the secured resource, SAML request is generated from SP and send it to IDP server successfully. IDP server process the request and send back the response through ACS URL. Now, Where we can handle this response? is the big concern. we have tried two scenarios: 1: handle the response in SP and extract the attributes. but after that how to send those attributes to Angular login page. if we use redirect flow, multiple user are accessing the same time, which user will get access first even its a Async way. 2: if we handle the response in Angular side, Page is giving 405 error response due to ACS URL is not supported the http method(both GET and POST). Can anyone help me how to tackle this.