Hello Joerg,
those steps are in the Installation / Admin guide for the BI Platform. All the product documentation is available on help.sap.com.
Assuming the scenario is the following:
User logs into the BI4 system with SAP_CREDENTIALS_BW and would like to run a report against the ERP system (which normally would require SAP_CREDENTIALS_ERP), then the following needs to happen:
- BI4 Server needs to be configured with SAP authentication for both SAP server
- Trust between BW and ERP needs to be established
- Trust between BW and BI4 needs to be established
- Single Sign On Token Service needs to be configured
- User Alias need to be configured
regards
Ingo Hilgefort, SAP