Critical Notice: Azure Functions assets are now hosted from `cdn.functions.azure.com`

All Functions assets are now distributed from a new domain - `cdn.functions.azure.com` - which comes from a new Content Delivery Network (CDN). These changes are a result of the original CDN provider [ceasing operations](https://learn.microsoft.com/en-us/azure/cdn/edgio-retirement-faq).

**If you have any dependencies on the old distribution domains (`functionscdn.azureedge.net` or `functionscdnstaging.azureedge.net`), you must update to the new `cdn.functions.azure.com`. We expect `azureedge.net` domains to cease by 2025-05-31 (at latest).**

## Azure Functions team remediation

The Azure Functions team migrated our CDNs to Azure Front Door on 2025-01-14 and retained the existing domain during that migration. We have now created new domains pointing to the same resources:

- `cdn.functions.azure.com`
- `cdn-staging.functions.azure.com`

The new domains are fully endpoint compatible and include all existing paths, files, etc. that were available from the old domains.

The Azure Functions team is ensuring that all references are updated within our products. You can see a full list of these updates as sub-issues of https://github.com/Azure/Azure-Functions/issues/2576.

## User Remediation

### Direct dependency in user code

Please make the following replacements as soon as practical:

- `functionscdn.azureedge.net` -> `cdn.functions.azure.com`
- `functionscdnstaging.azureedge.net` -> `cdn-staging.functions.azure.com`

The new domains are endpoint compatible with the old domains; all resources available from the old domains are available through the new domains.

**Inaction by 2025-05-31 (at latest) may lead to availability issues.**

We do not recommend that customers take any dependency on `cdn-staging.functions.azure.com`. It is purely for internal use, and its documentation here is for completeness. Instead, please just use `cdn.functions.azure.com`.

### Indirect dependency through product assets

Please also prepare to take updates to product assets as the Azure Functions team replaces in-product references. Release updates will be tracked centrally from this issue.

You should plan on updates to:

- The Azure Functions Core Tools
- Azure Functions Docker images
- The Azure Functions extension for Visual Studio Code
- Visual Studio

You should also plan on updates to any other tools or assets which may have a dependency on the old domains.

**Inaction by 2025-05-31 (at latest) may lead to availability issues.**