Hyper-scale Configuration Delivery via Azure Front Door (Preview)

We’re excited to announce a new capability: **Azure App Configuration now supports hyper-scale configuration delivery** directly to your applications via **Azure Front Door**. Use this feature for browser-based JavaScript apps, .NET MAUI mobile and desktop applications, and applications requiring high-scale configuration including AI and agent applications where you need to update model parameters, guardrails, or UI logic dynamically.

**Key Features**
- **Secure by design:** Client apps → Front Door → App Configuration. Front Door authenticates to App Configuration using its managed identity, keeping the store protected and never directly exposed.
- **Expose only a scoped configuration subset** using filters for keys, labels, and snapshots.
- **CDN-scale performance** for thousands or millions of application instances.
- **Supports JavaScript and .NET** providers today, with more platform support coming soon.

**Getting Started**
Follow this [blog post](https://techcommunity.microsoft.com/blog/appsonazureblog/unlocking-client-side-configuration-at-scale-with-azure-app-configuration-and-az/4470781) to walk through the setup end-to-end, or start with the steps below in the Azure App Configuration portal:

1. Connect your App Configuration store to Azure Front Door in the App Configuration portal. (Or follow this [step-by-step guide](https://learn.microsoft.com/azure/azure-app-configuration/how-to-connect-azure-front-door).)
2. Scope which key-values, labels, or snapshots will be exposed to client applications.
3. In your client app, call the provider’s `loadFromAzureFrontDoor()` method ([JavaScript](https://github.com/Azure-Samples/appconfig-javascript-clientapp-with-afd)) or `ConnectToAzureFrontDoor()` ([.NET](https://github.com/Azure-Samples/appconfig-maui-app-with-afd)).
4. Your application now retrieves configuration from the edge and supports live updates—no redeployment required when you change settings.

**Documentation & Samples**
- [Detailed end-to-end flow explained in the blog post](https://techcommunity.microsoft.com/blog/appsonazureblog/unlocking-client-side-configuration-at-scale-with-azure-app-configuration-and-az/4470781)
- [Demo video](https://youtu.be/TzXvFgIAhUk)
- [How to connect App Configuration to Azure Front Door](https://learn.microsoft.com/azure/azure-app-configuration/how-to-connect-azure-front-door)
- [JavaScript sample](https://github.com/Azure-Samples/appconfig-javascript-clientapp-with-afd)
- [.NET MAUI sample](https://github.com/Azure-Samples/appconfig-maui-app-with-afd)

We’d love to hear your [feedback](https://github.com/Azure/AppConfiguration/issues/new) and see what you build with this capability.