Update entra external id articles

Author: evachen96

articles/healthcare-apis/fhir/azure-ad-b2c-setup.md

@@ -15,9 +15,13 @@ ms.custom:
 
 # Use Azure Active Directory B2C to grant access to the FHIR service
 
-[!INCLUDE [active-directory-b2c-end-of-sale-notice-b](../../../includes/active-directory-b2c-end-of-sale-notice-b.md)]
+[!INCLUDE [active-directory-b2c-end-of-sale-notice-b](../../../includes/active-directory-b2c-end-of-sale-notice-b.md)
+]
 
-Healthcare organizations can use [Azure Active Directory B2C](../../active-directory-b2c/overview.md) (Azure AD B2C) with the FHIR® service in Azure Health Data Services to grant access to their applications and users. 
+> [!NOTE]
+> This article details how to use Azure AD B2C, which is no longer available to purchase for new customers. Please refer to [Use Microsoft Entra External ID to grant access to the FHIR service](azure-entra-external-id-setup.md) for information on using Microsoft Entra External ID as an identity provider for the FHIR service.
+
+The FHIR service is secured by Microsoft Entra ID. In addition, healthcare organizations can choose to also use [Azure Active Directory B2C](../../active-directory-b2c/overview.md) (Azure AD B2C) with the FHIR® service in Azure Health Data Services to grant access to their applications and users via third party identity providers. 
 
 ## Create an Azure AD B2C tenant for the FHIR service
 

articles/healthcare-apis/fhir/azure-entra-external-id-setup.md

@@ -7,7 +7,7 @@ ms.service: azure-health-data-services
 ms.subservice: fhir
 ms.topic: tutorial
 ms.date: 07/30/2025
-ms.author: v-kopparthim
+ms.author: evach
 ---
 
 # Use Microsoft Entra External ID to grant access to the FHIR service