title: Microsoft Graph: Get access without a user
body: <p>I have successfully implement the "OAuth 2.0 authorization code flow" to access my outlook.com calendar. Now I would like to implement the "OAuth 2.0 client credentials flow". When accessing</p>
  
  <p><a href="https://login.microsoftonline.com/common/adminconsent" rel="nofollow noreferrer">https://login.microsoftonline.com/common/adminconsent</a>?...</p>
  
  <p>I get the following error:</p>
  
  <p>GET /OAuthTest0?error=access_denied&amp;error_description=AADSTS50020%3a+...</p>
  
  <p>Do I need an Office356 and/or an Azure Active Directory license to implement the "client credentials flow"?</p>
  
  <p>Thanks</p>
  
  <p>Emil</p>