title: Multi tenant support for Microsoft Graph API
body: <p>As i am playing with the Microsoft Graph API (<a href="https://graph.microsoft.io/" rel="nofollow">https://graph.microsoft.io/</a>) I want to understand the multi-tenancy support for Graph API.</p>
  
  <p>As i understand, we need to first create and register our app (<a href="http://dev.office.com/app-registration" rel="nofollow">http://dev.office.com/app-registration</a>) with the O365 Azure AD before we can use it to access the graph API. </p>
  
  <p>This is is consistent with the earlier model, where apps were created directly in the underlying AD. I believe the above app creation step does the same.</p>
  
  <p>While this allows the app to access the graph API for the tenant where we have registered the app, the app cannot access other tenant data. <strong>How do we do that?</strong></p>
  
  <p>AD apps earlier had a <strong>grant access</strong> flow, where the app used to present a dialog to user in other tenant to authorize the app. <strong>Does this flow still holds good?</strong></p>
  
  <p>Any guidance in this regards would be helpful.</p>