Hi @THITI ATTHAWIBULKUL ,
Thank you for posting this in Microsoft Q&A.
I understand you are asking about SAP SuccessFactors integrated with MS Entra ID.
There are three ways to integrate SAP SuccessFactors with Microsoft Entra ID for authentication:
1.Use the enterprise application in Microsoft Entra ID to configure both single sign-on (SSO) and provisioning to SAP applications such as SAP Analytics Cloud.
2.Use the SAP Identity Authentication Service (IAS) enterprise application in Microsoft Entra ID to provision identities into SAP IAS.
3.Use the SAP IPS integration to directly export identities from Microsoft Entra ID into your applications.
Yes, When SAP SuccessFactors is integrated with MS Entra ID for authentication, MS Entra ID can receive authentication from SAP SuccessFactors.
If you are use SSO, you can configure the user sign-in experience to ensure that users are not redirected to the Microsoft authentication page.
For your reference: https://learn.microsoft.com/en-us/entra/id-governance/sap
Hopes this helpful. Do let us know if you have any further queries.