I blogged about using Azure AD (AAD) groups as roles in an ASP.net MVC application a while ago. While speaking at Namesdays in Espoo, Finland last week, I presented briefly how the same approach can be applied in a WebAPI project. If you want to use AAD groups for adding...

Update 23.2.2015: Group memberships are now included in the access token and you might want to consider using the new Application Roles functionality instead. Check the new blog post for info.