Update in-place-migration-portal.md

Author: hirenshah1

articles/cloud-services-extended-support/in-place-migration-portal.md

@@ -13,6 +13,9 @@ ms.date: 07/24/2024
 
 # Migrate to Cloud Services (extended support) using the Azure portal
 
+> [!IMPORTANT]
+> As of March 31, 2025, cloud Services (classic) is deprecated and will be fully retired on March 31, 2027. [Learn more](https://aka.ms/csesretirement) about this deprecation and [how to migrate](https://aka.ms/cses-retirement-march-2025).
+
 This article shows you how to use the Azure portal to migrate from [Cloud Services (classic)](../cloud-services/cloud-services-choose-me.md) to [Cloud Services (extended support)](overview.md).
 
 ## Before you begin