Update feature-support-analysis.md

Author: hirenshah1

articles/cloud-services-extended-support/feature-support-analysis.md

@@ -10,6 +10,10 @@ ms.date: 07/24/2024
 # Customer intent: As a cloud solution architect, I want to compare the features of Cloud Services and Virtual Machine Scale Sets, so that I can select the best deployment model for my organization's scalability, availability, and management needs.
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 # Feature Analysis: Cloud Services (extended support) and Virtual Machine Scale Sets
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+> [!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).
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 This article provides a feature analysis of Cloud Services (extended support) and Virtual Machine Scale Sets. For more information on Virtual Machine Scale Sets, visit the documentation [here](/azure/virtual-machine-scale-sets/overview)