3440428 - "Invalid Login" error when accessing SuccessFactors instance via Identity Authentication

• SuccessFactors instance is integrated with Identity Authentication (IAS) as the identity provider or Identity Authentication as the proxy with a separate corporate identity provider.
• The following "Error: Invalid Login: Your account may be locked, inactive, or not included in the default user group. If your organization uses SSO, it may be not working correctly." is faced when accessing the SuccessFactors instance.
• After resetting the password, the browser redirects to a page showing “Invalid Login” instead of logging into SuccessFactors.

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental. 

• SAP SuccessFactors HCM Suite
• Identity Authentication Services
• SAP SuccessFactors Onboarding

invalid login, username, login name, Subject Name Identifier, SF, IAS, locked, inactive, SSO, permission@sf_validate, reset password, Onboardee, Onboardee Identity Authentication,  browser, , KBA , LOD-SF-PLT-IAS , Identity Authentication Services (IAS) With BizX , BC-IAM-IDS , Identity Authentication Service , LOD-SF-OBX-IAS , IAS User Authentication , Problem