Overview
When a user is presented with the Account Linking screen from the Account Linking Extension, they will see something like [https://{](https://{/)Auth0_tenant_name}.eu.webtask.run in the URL bar in the browser. Is it possible to configure the tenant’s custom domain for the Account Linking Extension?
Solution
Unfortunately, applying a custom domain to the Account Linking Extension is not available currently. Another option to consider is performing the linking on a server backend. This can help alleviate concerns that the end user is on the expected domain for example and a good guide on implementing this can be found here: User Account Linking: Server-Side Implementation (Regular web apps) or User-Initiated Account Linking: Client-Side Implementation (SPA). This method does not use the extension and does not use the https://{Auth0_tenant_name}.eu.webtask.run URL.