Authorization_IdentityNotFound Error while accessing graph API

Question

I have searched with the error which I found, Did not find any matching questions. So posting question. Appreciate if some one provides some pointers to proceed.

My

Answer 1

You'll find that this document is a better set of instructions for app-only apps.

There are two issues from your description that stand out.

1. You'll need to make the call with an X509 certificate for app-only flows.
2. You need to set up app scopes, rather than delegated scopes on your app - delegated scopes are for delegate flows rather than app-only flows.