2954188 - Failing to login to SuccessFactors instance through SAP IAS (Identity Authentication)

• When running the upgrade Activate Cloud Platform Identity Authentication's test, you fail to authenticate and validate the test
• SSO logs in Provisioning say "the issuer in response is not valid, expect xxx, but xxx"
• You are seeing this error on the SSO logs "[local user authentication fail for user *******]" even though the Login Name in IAS matches the Username in SF exactly
• After migration to SAP Cloud Platform Identity Authentication (Upgrade referred on this KBA 2791410), you are facing login issues as the ones below:
• Login is on a loop redirecting from SAP SuccessFactors domain to IAS domain continuously without login in
• When accessing the Error message "Identity Provider could not process the authentication request received", see below screenshot:

• Any other login issues like Missing Credentials page or Invalid Login page;

• SAP SuccessFactors HXM Suite
• Identity Authentication

IAS SAC SSO Upgrade fail looping, "Identity Provider could not process the authentication request received", IAS upgrade error, validation test fail, Case sensitivity, IAS sends name identifier in upper case, IAS is sending username which is different to what is configured, Invalid Login , KBA , LOD-SF-PLT-IAS , Identity Authentication Services (IAS) With BizX , BC-IAM-IDS , Identity Authentication Service , Problem