add info on Azure AD B2C monitoring

Author: JnHs

articles/lighthouse/concepts/cross-tenant-management-experience.md

@@ -1,7 +1,7 @@
 ---
 title: Cross-tenant management experiences
 description: Azure Lighthouse enables and enhances cross-tenant experiences in many Azure services.
-ms.date: 09/30/2021
+ms.date: 10/21/2021
 ms.topic: conceptual
 ---
 
@@ -98,6 +98,7 @@ Most tasks and services can be performed on delegated resources across managed t
 - Create alerts in customer tenants that trigger automation, such as Azure Automation runbooks or Azure Functions, in the managing tenant through webhooks
 - Create [diagnostic settings](../..//azure-monitor/essentials/diagnostic-settings.md) in workspaces created in customer tenants, to send resource logs to workspaces in the managing tenant
 - For SAP workloads, [monitor SAP Solutions metrics with an aggregated view across customer tenants](https://techcommunity.microsoft.com/t5/running-sap-applications-on-the/using-azure-lighthouse-and-azure-monitor-for-sap-solutions-to/ba-p/1537293)
+- For Azure AD B2C, [route sign-in and auditing logs](../../active-directory-b2c/azure-monitor.md) to different monitoring solutions
 
 [Azure Networking](../../networking/fundamentals/networking-overview.md):
 

articles/lighthouse/concepts/enterprise.md

@@ -1,7 +1,7 @@
 ---
 title: Azure Lighthouse in enterprise scenarios
 description: The capabilities of Azure Lighthouse can be used to simplify cross-tenant management within an enterprise which uses multiple Azure AD tenants.
-ms.date: 09/08/2021
+ms.date: 10/21/2021
 ms.topic: conceptual
 ---
 
@@ -45,6 +45,12 @@ Since enterprise users will typically have direct access to the enterprise’s t
 
 If you prefer, tenants within an enterprise can be onboarded by [publishing a Managed Services offer to Azure Marketplace](../how-to/publish-managed-services-offers.md). To ensure that the offer is only available to the appropriate tenants, be sure that your plans are marked as private. With a private plan, you provide the subscription IDs for each tenant that you plan to onboard, and no one else will be able to get your offer.
 
+## Azure Active Directory B2C (Azure AD B2C)
+
+[Azure Active Directory B2C](../../active-directory-b2c/overview.md) provides business-to-customer identity as a service. By delegating a resource group through Azure Lighthouse, you can use Azure Monitor to route Azure Active Directory B2C (Azure AD B2C) sign-in and auditing logs to different monitoring solutions. You can retain the logs for long-term use or integrate with third-party security information and event management (SIEM) tools to gain insights into your environment.
+
+For more information, see [Monitor Azure AD B2C with Azure Monitor](../../active-directory-b2c/azure-monitor.md).
+
 ## Terminology notes
 
 For cross-tenant management within the enterprise, references to service providers in the Azure Lighthouse documentation can be understood to apply to the managing tenant within an enterprise—that is, the tenant that includes the users who will manage resources in other tenants through Azure Lighthouse. Similarly, any references to customers can be understood to apply to the tenants that are delegating resources to be managed through users in the managing tenant.