Graph API - Insufficient privileges to complete the operation

Question

When trying to access the Graph Service Client using I am receiving the error :

Code: Authorization_RequestDenied
Message: Insufficient privile

Answer 1

For me the key to solve this problem was hint:

To use the Graph API with your B2C tenant, you will need to register a dedicated application by using the generic App Registrations menu (All Services and there it is by default not Favourite starred) in the Azure Portal, NOT Azure AD B2C's Applications menu. You can't reuse the already-existing B2C applications that you registered in the Azure AD B2C's Applications menu.

Find more on page AD B2C API access demo