We are a small company with about 15 employees, most of which are remote to our office.
We are working on a new Windows 8 store app for internal use enterprise (side-loading).
To date we have operated without AD and the app maintains and uses its own users and passwords. In the new app I want to use the Windows 8 logged in user (live.com) for identity and
Do I need to setup an on-premises AD and have it interoperate with Azure AD or can I use Azure AD without any on-premises AD?