2988303 - How to customize SAML2 error page or redirecting to own URL

User  already configured ICF service and setup SAML2 logon for it,
 It works well when user has a valid account, 
“However, when user log on is failed due to any reasons, any of the below should happen”

• end-users get a customized SAML2 error page,
• redirect the failed logon to user own website with guides for end-users about how to deal with the error,
• User will not wish the user to get user/password logon dialog prompt if SAML logon fails.

S/4 HANA and SAP NetWeaver

HTTP 401, Logon failed, redirect, SAML logon, Logon data, ICF, T-code SICF , KBA , BC-SEC-LGN-SML , SAML 2.0 for ABAP , BC-MID-ICF-LGN , ICF System Login , How To