Merge pull request #103505 from yoelhor/patch-2

Update identity-provider-azure-ad-multi-tenant-custom.md

Author: PRMerger15

articles/active-directory-b2c/identity-provider-azure-ad-multi-tenant-custom.md

@@ -9,7 +9,7 @@ manager: celestedg
 ms.service: active-directory
 ms.workload: identity
 ms.topic: conceptual
-ms.date: 09/13/2019
+ms.date: 02/06/2020
 ms.author: marsma
 ms.subservice: B2C
 ---
@@ -60,6 +60,19 @@ You need to store the application key that you created in your Azure AD B2C tena
 1. For **Key usage**, select `Signature`.
 1. Select **Create**.
 
+## Configuring optional claims
+
+If you want to get the `family_name` and `given_name` claims from Azure AD, you can configure optional claims for your application in the Azure portal UI or application manifest. For more information, see [How to provide optional claims to your Azure AD app](../active-directory/develop/active-directory-optional-claims.md).
+
+1. Sign in to the [Azure portal](https://portal.azure.com). Search for and select **Azure Active Directory**.
+1. From the **Manage** section, select **App registrations**.
+1. Select the application you want to configure optional claims for in the list.
+1. From the **Manage** section, select **Token configuration (preview)**.
+1. Select **Add optional claim**.
+1. Select the token type you want to configure.
+1. Select the optional claims to add.
+1. Click **Add**.
+
 ## Add a claims provider
 
 If you want users to sign in by using Azure AD, you need to define Azure AD as a claims provider that Azure AD B2C can communicate with through an endpoint. The endpoint provides a set of claims that are used by Azure AD B2C to verify that a specific user has authenticated.