Update README.md

Author: JimTharioAmazon

README.md

@@ -2,6 +2,10 @@
 
 Amazon Marketing Cloud Insights on AWS
 
+### The [Amazon Marketing Cloud Insights on AWS](https://aws.amazon.com/solutions/implementations/amazon-marketing-cloud-insights-on-aws/) solution will retire in November 2025
+
+Deployments (via CloudFormation or GitHub) will remain operational, but customers will assume responsibility for maintenance and API-related updates post-retirement.
+
 ## Architecture
 
 The following images show the architecture of the solution and its components 
@@ -189,4 +193,4 @@ This solution collects anonymized operational metrics to help AWS improve the qu
 
 ## License
 
-This project is licensed under the Apache-2.0 License.
+This project is licensed under the Apache-2.0 License.