New bullet in Troubleshooting section

Added a bullet about a possible VNet peering scenario when connecting App Service hosted application to MI

Author: cicovica

articles/sql-database/sql-database-managed-instance-connect-app.md

@@ -129,6 +129,8 @@ For troubleshooting connectivity issues, review the following:
 
 - If using VNet peering, ensure that you have followed the instructions for setting [Allow Gateway Transit and Use Remote Gateways](#connect-from-on-premises-with-vnet-peering).
 
+- If using VNet peering to connect an Azure App Service hosted application, and the Managed Instance VNet has a public IP address range, make sure that your hosted application settings allow your outbound traffic to be routed to public IP networks. Follow the instructions in [Regional VNet Integration](../app-service/web-sites-integrate-with-vnet.md#regional-vnet-integration).
+
 ## Required versions of drivers and tools
 
 The following minimal versions of the tools and drivers are recommended if you want to connect to Managed Instance: