In August 2021, Azure announced that the retirement of Cloud Services (classic) is happening on 31 August 2024. As App Service Environment v1 and v2 run on Cloud Services (classic), we’ll retire App Service…
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https://azure.microsoft.com/en-us/updates/app-service-environment-version-1-and-version-2-will-be-retired-on-31-august-2024-4/