Hello expert
we have a typical requirement for Java front-end to call ECC backend, REST - PI - ECC. However they require user authorization (Authority Check) in backend based on the user who calls the API. Normally we use ECC service user to call the ABAP proxy from PI, to allow using end user calling ECC from frontend, the only option is Principle propagation.
I've done lots of research on PP, none of them provided definite answer.
From SAP help (https://help.sap.com/doc/saphelp_scm700_ehp02/7.0.2/en-us/81/6d7e8093134d4f8417a2e780a3393f/frameset...), it seems that PP is only possible between SAP systems, as it mentioned you'd need to configure Trusted Relationship between Sender and PI, and between PI and backend, those configuration are SAP specific.
So my question is: is it possible to use PP between non SAP frontend and SAP backend? if yes, how to configure it? (including configuring Trusted Relationship in non-SAP system / application)
thank you so much
Jayson
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