Simulate MS AD SAML Login from server side code

Question

We are simulating web application calls to measure certain metrics. Simulator is invoking server calls within web application and first step is authentication.

Application is using SP-Initiated SAML authentication where Service Provider (Microsoft Azure) and Identity provider (unknown).

Simulator to simulate SAML authentication flow but on successful authentication SP(MicroSoft Azure) is redirecting user to IDP with SAMLResponse. Since SAMLResponse is not available within simulator, program cannot proceed with further steps. Also simulator doesn't have SP or IDP metadata to validate SAML response.

Simulator - Java
Note - Simulator does not have any knowledge of application and is just simulating HTTP, XHR, DOC calls etc.

Please let us know if anyone has worked SAML authentication with Azure or any help is welcome