Blazor WASM AAD B2C user flows (#17699)

Author: guardrex

aspnetcore/includes/blazor-security/wasm-aad-b2c-userflows.md

@@ -0,0 +1,5 @@
+## Custom user flows
+
+The Microsoft Authentication Library (`Microsoft.Authentication.WebAssembly.Msal`) doesn't support [AAD B2C user flows](/azure/active-directory-b2c/user-flow-overview) by default. Create custom user flows in developer code.
+
+For more information on how to build a challenge for a custom user flow, see [User flows in Azure Active Directory B2C](/azure/active-directory-b2c/user-flow-overview).

aspnetcore/security/blazor/webassembly/hosted-with-azure-active-directory-b2c.md

@@ -5,7 +5,7 @@ description:
 monikerRange: '>= aspnetcore-3.1'
 ms.author: riande
 ms.custom: mvc
-ms.date: 04/08/2020
+ms.date: 04/09/2020
 no-loc: [Blazor, SignalR]
 uid: security/blazor/webassembly/hosted-with-azure-active-directory-b2c
 ---
@@ -297,6 +297,9 @@ Run the app from the Server project. When using Visual Studio, select the Server
 <!-- HOLD
 [!INCLUDE[](~/includes/blazor-security/usermanager-signinmanager.md)]
 -->
+
+[!INCLUDE[](~/includes/blazor-security/wasm-aad-b2c-userflows.md)]
+
 [!INCLUDE[](~/includes/blazor-security/troubleshoot.md)]
 
 ## Additional resources

aspnetcore/security/blazor/webassembly/standalone-with-azure-active-directory-b2c.md

@@ -5,7 +5,7 @@ description:
 monikerRange: '>= aspnetcore-3.1'
 ms.author: riande
 ms.custom: mvc
-ms.date: 04/08/2020
+ms.date: 04/09/2020
 no-loc: [Blazor, SignalR]
 uid: security/blazor/webassembly/standalone-with-azure-active-directory-b2c
 ---
@@ -133,6 +133,8 @@ For more information, see <xref:security/blazor/webassembly/additional-scenarios
 
 [!INCLUDE[](~/includes/blazor-security/authentication-component.md)]
 
+[!INCLUDE[](~/includes/blazor-security/wasm-aad-b2c-userflows.md)]
+
 [!INCLUDE[](~/includes/blazor-security/troubleshoot.md)]
 
 ## Additional resources