When you start developing extension application for SuccessFactors, the thing you need to remember is that your OData endpoint URLs for accessing the OData APIs depend on the data center hosting your SuccessFactors instance.
OData API’s on Successfactors side is protected by basic and OAuth.
HTTP Basic authentication requires API access with technical user, which is being given all the required data access permissions on SuccessFactors side.
By using Authentication type as “OAuth2SAMLBearerAssertion” you can enable principal propagation which allows extension applications to access OData APIs on behalf of the logged in user. Each application uses dedicated OAuth client, which gives additional logging and monitoring capabilities for administrators upon which application is accessing the data. With OAuth, no user passwords are exchanged between parties and this authentication type is fully supported by SAP Cloud Platform Connectivity service.
Click below link to find out URLs for each of the SuccessFactors data centers: