Azure Cloud Service Role's instance have access denied errors: "caller was not found on any access policy"

Question

My Azure Cloud Service (classic) has one role with two instances that are receiving access denied errors when trying to access a key vault because a caller that they are using was "not found on any access policy". I don't know who the caller is, but it did provide me with the caller's appid, oid, and iss. How do I find out who the caller is?

I've also looked at this question... do I use one of the accepted answer's procedures to grant the caller access to the key vault?

Thank you for helping!

Answer 1

You can search the caller by appid when adding a Service Principal to an access policy. I then followed the question that I linked above and it all worked.