Obtain a valid TLS/SSL certificate by using internal certificate authorities, purchasing a certificate from an external issuer, or using a self-signed certificate. In order for the apps to support TLS, you need to upload certificates. When you have an ILB ASE, the apps are reached based on the domain name that you specify when creating the ILB ASE. By default all ASEs, even ILB ASEs, are created with certificates that follow that format. If you are using an External ASE, then your apps are reached at. Because it is single tenant, there are some features available only with an ASE that are not available in the multi-tenant App Service. You can learn more about the ILB ASE from the Create and use an ILB ASE document. If you deploy the ASE with an endpoint in your VNet, that deployment is called an ILB ASE. If you deploy the ASE with an internet accessible endpoint, that deployment is called an External ASE. It can be deployed with an internet accessible application endpoint or an application endpoint that is in your VNet.

The App Service Environment(ASE) is a deployment of the Azure App Service that runs within your Azure Virtual Network(VNet). If you're currently using App Service Environment v2, please follow the steps in this article to migrate to the new version. To learn more about the new version, start with the Introduction to the App Service Environment. There's a new version of App Service Environment that is easier to use and runs on more powerful infrastructure. App Service Environment v2 will be retired on 31 August 2024. This article is about App Service Environment v2 which is used with Isolated App Service plans.

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