temporary

Author: madsd

articles/app-service/overview-vnet-integration.md

@@ -94,7 +94,7 @@ Learn [how to configure application routing](./configure-vnet-integration-routin
 We recommend that you use the **Route All** configuration setting to enable routing of all traffic. Using the configuration setting allows you to audit the behavior with [a built-in policy](https://portal.azure.com/#blade/Microsoft_Azure_Policy/PolicyDetailBlade/definitionId/%2Fproviders%2FMicrosoft.Authorization%2FpolicyDefinitions%2F33228571-70a4-4fa1-8ca1-26d0aba8d6ef). The existing `WEBSITE_VNET_ROUTE_ALL` app setting can still be used, and you can enable all traffic routing with either setting.
 
 > [!NOTE]
-> Outbound SMTP connectivity (port 25) is supported for App Service when the SMTP traffic is routed through the virtual network integration. The supportability is determined by the subscription where the virtual network is deployed. For virtual networks/subnets created before 1. August 2022, you will have to contact support if you have issues with SMTP support. See [Troubleshoot outbound SMTP connectivity problems in Azure](../virtual-network/troubleshoot-outbound-smtp-connectivity.md).
+> Outbound SMTP connectivity (port 25) is supported for App Service when the SMTP traffic is routed through the virtual network integration. The supportability is determined by a setting on the subscription where the virtual network is deployed. For virtual networks/subnets created before 1. August 2022 you need to initiate a temporary configuration change to the virtual network/subnet for the setting to be synchronized from the subscription. An example could be to add a temporary subnet, associate/dissociate an NSG temporarily or configure a service endpoint temporarily. For more information and troubleshooting see [Troubleshoot outbound SMTP connectivity problems in Azure](../virtual-network/troubleshoot-outbound-smtp-connectivity.md).
 
 #### Configuration routing