How to Configure SSO Between SAP xRPM Frontend and Backend Systems
You want to configure Single Sign-On (SSO) between the SAP xRPM frontend (SAP Enterprise Portal 6.0) and the SAP xRPM backend (SAP Web Application Server 6.20 or higher). SAP xRPM 2.0 runs on SAP Enterprise Portal (EP). To ensure that users only have to log on once, you must configure SSO is configured between SAP EP (frontend system) and the SAP Web Application Server (Web AS). It also makes sense for both SAP EP and SAP Web AS to use the same user store. SAP EP often uses the backend as the user store, since users then only have to be maintained once.