title: Angular Azure Active Directory B2C Authentication - CORS issue
body: <p>I am implementing Azure Active Directory B2C authentication in Angular. I am using msal interceptor to connect Azure AD B2C. The authentication request fails with error </p>
  
  <blockquote>
    <p>Access to XMLHttpRequest at '<a href="https://login.microsoftonline.com/" rel="noreferrer">https://login.microsoftonline.com/</a>...'
    from origin '<a href="http://localhost/" rel="noreferrer">http://localhost/</a>...' has been blocked by CORS policy: No
    'Access-Control-Allow-Origin' header is present on the requested
    resource.</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/MuVPx.png" rel="noreferrer"><img src="https://i.stack.imgur.com/MuVPx.png" alt="browser console screenshot"></a></p>
  
  <p>I configured everything according to this post: <a href="https://medium.com/@sambowenhughes/configuring-your-angular-6-application-to-use-microsoft-b2c-authentication-99a9ff1403b3" rel="noreferrer">https://medium.com/@sambowenhughes/configuring-your-angular-6-application-to-use-microsoft-b2c-authentication-99a9ff1403b3</a></p>