Merge pull request #36820 from dotnet/main

Merge to Live

Author: wadepickett

aspnetcore/security/authentication/azure-ad-b2c.md

@@ -4,7 +4,7 @@ author: guardrex
 description: Discover how to set up Azure Active Directory B2C authentication with ASP.NET Core.
 ms.author: wpickett
 ms.custom: "devx-track-csharp, mvc"
-ms.date: 01/22/2026
+ms.date: 02/27/2026
 uid: security/authentication/azure-ad-b2c
 ---
 # Cloud authentication with Azure Active Directory B2C in ASP.NET Core
@@ -16,7 +16,7 @@ By [Damien Bod](https://github.com/damienbod)
 [Azure Active Directory B2C](/azure/active-directory-b2c/active-directory-b2c-overview) (Azure AD B2C) is a cloud identity management solution for web and mobile apps. The service provides authentication for apps hosted in the cloud and on-premises. Authentication types include individual accounts, social network accounts, and federated enterprise accounts. Additionally, Azure AD B2C can provide multi-factor authentication with minimal configuration.
 
 > [!TIP]
-> Microsoft Entra ID, Microsoft Entra External ID and Azure AD B2C are separate product offerings. An Entra ID tenant generally represents an organization, while an Azure AD B2C tenant or a Microsoft Entra External ID  tenant can represent a collection of identities to be used with relying party applications. To learn more, see [Azure AD B2C: Frequently asked questions (FAQ)](/azure/active-directory-b2c/active-directory-b2c-faqs).
+> Microsoft Entra ID, Microsoft Entra External ID and Azure AD B2C are separate product offerings. An Entra ID tenant generally represents an organization, while an Azure AD B2C tenant or a Microsoft Entra External ID tenant can represent a collection of identities to be used with relying party applications. To learn more, see [Azure AD B2C: Frequently asked questions (FAQ)](/azure/active-directory-b2c/active-directory-b2c-faqs).
 
 > [!TIP]
 > [Microsoft Entra External ID for customers](/azure/active-directory/external-identities/customers/overview-customers-ciam) is Microsoft’s new customer identity and access management (CIAM) solution.
@@ -68,6 +68,7 @@ In this tutorial, you'll learn how to configure an ASP.NET Core app for authenti
     * For **Domain**, use the domain of your Azure AD B2C tenant.
     * For **ClientId**, use the **Application (client) ID** from the app registration you created in your tenant.
     * For **Instance**, use the domain of your Azure AD B2C tenant.
+    * For **TenantId**, use the **Tenant ID** from your Azure AD B2C tenant. In the Azure portal, search for and select **Microsoft Entra ID**. In the **Overview**, copy the **Tenant ID**.
     * For **SignUpSignInPolicyId**, use the user flow policy defined in the Azure B2C tenant
 	* Use either the **ClientSecret** or the **ClientCertificates** configuration. ClientCertificates are recommended.
     * Leave all other values as they are.
@@ -102,7 +103,7 @@ In this tutorial, you'll learn how to configure an ASP.NET Core app for authenti
 
         In the preceding code:
 
-        * Calls to the `AddAuthentication` and `AddMicrosoftIdentityWebApp` methods configure the app to use Open ID Connect, specifically configured for the Microsoft identity platform.
+        * Calls to the `AddAuthentication` and `AddMicrosoftIdentityWebApp` methods configure the app to use OpenID Connect, specifically configured for the Microsoft identity platform.
         * `AddAuthorization` initializes ASP.NET Core authorization.
         * The `AddRazorPages` call configures the app so anonymous browsers can view the Index page. All other requests require authentication.
         * `AddMvcOptions` and `AddMicrosoftIdentityUI` add the required UI components for redirecting to/from Azure AD B2C.
@@ -116,7 +117,7 @@ In this tutorial, you'll learn how to configure an ASP.NET Core app for authenti
 ## Run the app
 
 > [!NOTE]
-> Use the profile which matches the Azure App registration **Redirect URIs**
+> Use the profile which matches the Azure App registration **Redirect URIs**.
 1. Run the app.
     
     ```dotnetcli

aspnetcore/security/authentication/index.md

@@ -1,10 +1,11 @@
 ---
 title: Overview of ASP.NET Core Authentication
+ai-usage: ai-assisted
 author: mjrousos
 description: Learn about authentication in ASP.NET Core.
 ms.author: tdykstra
 ms.custom: mvc
-ms.date: 10/18/2022
+ms.date: 02/26/2026
 uid: security/authentication/index
 ---
 # Overview of ASP.NET Core authentication
@@ -137,7 +138,7 @@ See the following links for differences between challenge and forbid:
 
 ## Authentication providers per tenant
 
-ASP.NET Core doesn't have a built-in solution for multi-tenant authentication. While it's possible for customers to write one using the built-in features, we recommend customers consider [Orchard Core](https://www.orchardcore.net/), [ABP Framework](https://abp.io/), or [Finbuckle.MultiTenant](https://www.finbuckle.com/multitenant)  for multi-tenant authentication.
+ASP.NET Core doesn't have a built-in solution for multi-tenant authentication. While it's possible for customers to write one using the built-in features, we recommend customers consider [Orchard Core](https://www.orchardcore.net/), [ABP Framework](https://abp.io/), or [Finbuckle.MultiTenant](https://www.finbuckle.com/multitenant) for multi-tenant authentication.
 
 Orchard Core is:
 
@@ -156,7 +157,6 @@ Finbuckle.MultiTenant:
 * Provides data isolation
 * Configure app behavior uniquely for each tenant
 
-
 ## Additional resources
 
 * <xref:security/authorization/limitingidentitybyscheme>
@@ -286,7 +286,7 @@ See the following links for differences between challenge and forbid:
 
 ## Authentication providers per tenant
 
-ASP.NET Core doesn't have a built-in solution for multi-tenant authentication. While it's possible for customers to write one using the built-in features, we recommend customers to consider [Orchard Core](https://www.orchardcore.net/) or [ABP Framework](https://abp.io/) for multi-tenant authentication.
+ASP.NET Core doesn't have a built-in solution for multi-tenant authentication. While it's possible for customers to write one using the built-in features, we recommend customers consider [Orchard Core](https://www.orchardcore.net/) or [ABP Framework](https://abp.io/) for multi-tenant authentication.
 
 Orchard Core is:
 
@@ -429,16 +429,11 @@ See the following links for differences between challenge and forbid:
 
 ## Authentication providers per tenant
 
-ASP.NET Core framework doesn't have a built-in solution for multi-tenant authentication.
-While it's possible for customers to write an app with multi-tenant authentication, we recommend using one of the following asp.net core application frameworks that support multi-tenant authentication:
-
-### Orchard Core
+ASP.NET Core framework doesn't have a built-in solution for multi-tenant authentication. While it's possible for customers to write an app with multi-tenant authentication, we recommend using one of the following ASP.NET Core application frameworks that support multi-tenant authentication.
 
-[Orchard Core](https://orchardcore.net/). See the [Orchard Core](https://github.com/OrchardCMS/OrchardCore) source for an example of authentication providers per tenant.
+[Orchard Core](https://www.orchardcore.net/) is an open-source, modular, and multi-tenant app framework built with ASP.NET Core that also provides a content management system (CMS). See the [Orchard Core](https://github.com/OrchardCMS/OrchardCore) source for an example of authentication providers per tenant.
 
-### ABP Framework
-
-[ABP Framework](https://abp.io/) supports various architectural patterns including modularity, microservices, domain driven design, and multi-tenancy. See [ABP Framework source on GitHub](https://github.com/abpframework/abp).
+[ABP Framework](https://abp.io/) supports various architectural patterns including modularity, microservices, domain-driven design, and multi-tenancy. See [ABP Framework source on GitHub](https://github.com/abpframework/abp).
 
 ## Additional resources