To enable browsing the app service, add a redirect URI to the earlier registered app.
To add the redirect URI:
Select the 'Web' platform.
Enter this URI: [app service URL]/signin-oidc. For example: https://example.azurewebsites.net/signin-oidc. You can copy the URL from the App service Overview page.
Select the ID tokens check box.
For more information, refer to Add a redirect URI.