updated sign-in steps for admin center

Author: davidmu1

articles/active-directory/develop/scenario-mobile-app-registration.md

@@ -40,25 +40,23 @@ For more information, see [Scenarios and supported authentication flows](authent
 
 ### Interactive authentication
 
-When you build a mobile app that uses interactive authentication, the most critical registration step is the redirect URI. You can set interactive authentication through the [platform configuration on the **Authentication** blade](https://aka.ms/MobileAppReg).
+When you build a mobile app that uses interactive authentication, the most critical registration step is the redirect URI. This experience enables your app to get single sign-on (SSO) through Microsoft Authenticator (and Intune Company Portal on Android). It also supports device management policies.
 
-This experience will enable your app to get single sign-on (SSO) through Microsoft Authenticator (and Intune Company Portal on Android). It will also support device management policies.
-
-The app registration portal provides a preview experience to help you compute the brokered reply URI for iOS and Android applications:
-
-1. In the app registration portal, select **Authentication** > **Try out the new experience**.
-
-   ![The Authentication blade, where you choose a new experience](https://user-images.githubusercontent.com/13203188/60799285-2d031b00-a173-11e9-9d28-ac07a7ae894a.png)
-
-2. Select **Add a platform**.
+1. Sign in to the [Microsoft Entra admin center](https://entra.microsoft.com) as at least an [Application Developer](../roles/permissions-reference.md#application-developer).
+1. Browse to **Identity** > **Applications** > **App registrations**.
+1. Select **New registration**.
+1. Enter a **Name** for the application.
+1. For **Supported account types**, select **Accounts in this organizational directory only**.
+1. Select **Register**.
+1. Select **Authentication** and then select **Add a platform**.
 
    ![Add a platform](https://user-images.githubusercontent.com/13203188/60799366-4c01ad00-a173-11e9-934f-f02e26c9429e.png)
 
-3. When the list of platforms is supported, select **iOS**.
+1. When the list of platforms is supported, select **iOS / macOS**.
 
    ![Choose a mobile application](https://user-images.githubusercontent.com/13203188/60799411-60de4080-a173-11e9-9dcc-d39a45826d42.png)
 
-4. Enter your bundle ID, and then select **Register**.
+1. Enter your bundle ID, and then select **Configure**.
 
    ![Enter your bundle ID](https://user-images.githubusercontent.com/13203188/60799477-7eaba580-a173-11e9-9f8b-431f5b09344e.png)
 
@@ -81,7 +79,7 @@ If your app uses only username-password authentication, you don't need to regist
 
 However, identify your application as a public client application. To do so:
 
-1. Still in the <a href="https://portal.azure.com/" target="_blank">Azure portal</a>, select your app in **App registrations**, and then select **Authentication**.
+1. Still in the Microsoft Entra admin center, select your app in **App registrations**, and then select **Authentication**.
 1. In **Advanced settings** > **Allow public client flows** > **Enable the following mobile and desktop flows:**, select **Yes**.
 
    :::image type="content" source="media/scenarios/default-client-type.png" alt-text="Enable public client setting on Authentication pane in Azure portal":::