title: After creating new API Management Service instance, why cant the built in admin account login to developer portal to approve registered applications?
body: <p>After a new instance is created, there is only a single user. I can add a second user, and that user can login to azure developer portal and register application. 
  As an admin, I receive the email request which includes the link to 
  http://{newAPIMS}.portal.azure-api.net/Admin</p>
  
  <p>However, my login does NOT work, and even trying to reset password results in 'User does not exist'</p>
  
  <p>Steps to reproduce.
  Create new api management instance (which creates your email as admin)
  Create second user, with different email. (Developer role)
  Have the second user login to http://{newAPIMS}.portal.azure-api.net, register application. </p>
  
  <p>Wiat for email to admin account, attempt to click link to approve app. </p>