How to get system details using GRAC_ROLE_DETAILS_WS

Hi Experts,

We are connecting SAP GRC system with DELL IAM application.

In web service GRAC_ROLE_DETAILS_WS, we are get Business Process role details without <Systems/> information, which is always giving us a blank. Can anyone explain metadata of Web Service GRAC_ROLE_DETAILS_WS response, or any idea on how to get the System information?

The main intention here is, while using GRAC_USER_ACCES_WS (User Access Request Service) to create access request its mandatory to fill <ReqInitSystem>XXXXCLNT000</ReqInitSystem> <!--Value based on customer’s config.-->

We are trying to fill the mandatory element <ReqInitSystem>, with Role Details Web Service.

Any ideas/advise are welcome

Thanks in advance

Narender