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" is seen after a successful authentication when accessing the SuccessFactors instance.

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
• Identity Authentication

invalid login, username, loginname, Subject Name Identifier, SF, IAS , KBA , LOD-SF-PLT-IAS , Identity Authentication Services (IAS) With BizX , BC-IAM-IDS , Identity Authentication Service , Problem