Update generate-template-portal.md

Author: hirenshah1

articles/cloud-services-extended-support/generate-template-portal.md

@@ -13,6 +13,9 @@ ms.custom: devx-track-arm-template
 
 # Generate ARM Template for 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 explains how to download the ARM template and parameter file from the [Azure portal](https://portal.azure.com) for your Cloud Service. The ARM template and parameter file can be used in deployments via PowerShell to create or update a cloud service
 
 ## Get ARM template via portal