title: Dynamics Power Portals Authentication Types
body: <p>I am implementing a Dynamics Power Pages/Portal for a Banking sector and the users are from Government Sector and I want to know what is the best way to authenticate these users on the portal.</p>
  <p>Requirement -</p>
  <ul>
  <li>There is an existing system where the users create service request for the Bank.</li>
  <li>The case managers in the bank manually create cases in CRM as soon
  as the request arrives in the above system.</li>
  </ul>
  <p>Since it is a banking portal I cannot use External Identity providers like Microsoft, Google, Facebook, Gmail etc. So I understand I need to go with Azure B2C Authentication</p>
  <p>However I have few basic questions -</p>
  <ol>
  <li><p>Should I be using Azure B2C Authentication for this, if yes what would be a valid email address where the verification code would be sent? Will any email address with a valid domain can get registered? Or is there a mechanism through which i can limit the domain so that only customers of Govt sector can use their email address?</p>
  </li>
  <li><p>Or since I can view the customers list in the existing system, Should I be using the invitation mechanism to register users? Like create those customers as contact in the system and send invitation code to them However I don't know what email address should they be using in this case? And where the entered email and password stored in this case?</p>
  </li>
  </ol>
  <p>I am totally new these concepts.</p>