Merge pull request #264552 from KennedyDenMSFT/US205213

User Story 205213 - Added retirement notice for URL ping tests

Author: prmerger-automator[bot]

articles/azure-monitor/app/availability-overview.md

@@ -8,12 +8,15 @@ ms.reviewer: shyamala
 
 # Application Insights availability tests
 
-After you've deployed your web app or website, you can set up recurring tests to monitor availability and responsiveness. [Application Insights](./app-insights-overview.md) sends web requests to your application at regular intervals from points around the world. It can alert you if your application isn't responding or responds too slowly.
+After you deploy your web app or website, you can set up recurring tests to monitor availability and responsiveness. [Application Insights](./app-insights-overview.md) sends web requests to your application at regular intervals from points around the world. It can alert you if your application isn't responding or responds too slowly.
 
 You can set up availability tests for any HTTP or HTTPS endpoint that's accessible from the public internet. You don't have to make any changes to the website you're testing. In fact, it doesn't even have to be a site that you own. You can test the availability of a REST API that your service depends on.
 
 ## Types of tests
 
+> [!IMPORTANT]
+> On September 30, 2026, URL ping tests in Application Insights will be retired. Existing URL ping tests will be removed from your resources. Review the [pricing](https://azure.microsoft.com/pricing/details/monitor/#pricing) for standard tests and [transition](https://aka.ms/availabilitytestmigration) to using them before September 30, 2026 to ensure you can continue to run single-step availability tests in your Application Insights resources.
+
 There are four types of availability tests:
 
 * [Standard test](availability-standard-tests.md): This single request test is similar to the URL ping test. It includes TLS/SSL certificate validity, proactive lifetime check, HTTP request verb (for example, `GET`, `HEAD`, or `POST`), custom headers, and custom data associated with your HTTP request.