title: Office 365 API limitation to Subscription Plan? And prerequisites?
body: <p>2 questions:</p>
  
  <ol>
  <li>Does Graph API apply to all O365 subscription plan without difference? (Business/Business Essential/E1/E2/E5/Education/etc.)</li>
  <li>What's the prerequisites for O365 user to use an Application using O365 APIS? (For example, a O365 Trial version user, or a user only activate O365 but didn't create Azure AD, will it pass authentication process?)</li>
  </ol>
  
  <p>Thanks,
  Raymond,</p>