This article shows you the additional information you need in order to use Azure AD Tenant ID for Authentication by following this article https://blogs.msdn.microsoft.com/kaevans/2014/04/15/calling-o365-apis-from-your-web-api-on-behalf-of-a-user/.
You will not have any problem for the following the step to create a Web API project with Change Authentication.
But how to you get to this screen?
This is the correct link:
There is another problem I am facing. In order to do this you must be the administrator for your organization Azure AD.