Service Principal Assigned App Role With Sensitive Access

'Detects a Service Principal being assigned an app role that has sensitive access such as Mail.Read. A threat actor who compromises a Service Principal may assign it an app role to allow it to access sensitive data, or to perform other actions. Ensure that any assignment to a Service Principal is valid and appropriate. Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-applications#application-granted-highly-privileged-permissions'