This application allows you to see users count per application, you can see internal and external users as well and roles assigned to each users.

To see internal and external users you just need to enter domain name (i.e. example.com) 

So all end users with email addresses belonging to entered domain are classified as internal, and all end users with email addresses outside domain are classified as external. For example, if your organization owns example.com and the end user's email is adam@example.com, then the end user will be classified as internal.