update link

Author: craigshoemaker

articles/container-apps/vnet-custom.md

@@ -21,7 +21,7 @@ As you create an Azure Container Apps [environment](environment.md), a virtual n
 - You can restrict inbound requests to the environment exclusively to the VNET by deploying the environment as internal.
 
 > [!IMPORTANT]
-> In order to ensure the environment deployment within your custom VNET is successful, configure your VNET with an "allow-all" configuration by default. The full list of traffic dependencies required to configure the VNET as "deny-all" is not yet available. Refer to the [custom VNET security sample](https://aka.ms/azurecontainerapps/customvnet) for additional details.
+> In order to ensure the environment deployment within your custom VNET is successful, configure your VNET with an "allow-all" configuration by default. The full list of traffic dependencies required to configure the VNET as "deny-all" is not yet available. Refer to [Known issues for public preview](https://github.com/microsoft/azure-container-apps/wiki/Known-Issues-for-public-preview) for additional details.
 
 :::image type="content" source="media/networking/azure-container-apps-virtual-network.png" alt-text="Azure Container Apps environments use an existing VNET, or you can provide your own.":::