How do you access the default Azure Virtual Network DNS server with address 168.63.129.16 from on-premises locations?

The default Azure virtual network DNS server with address 168.63.129.16 is a private IP address and is not accessible from the Internet or from on-premises locations. This address is reserved for use by Azure for internal communication and is not intended to be accessed directly.

To access the DNS server of an Azure virtual network from an on-premises location, you will need to establish a VPN or ExpressRoute connection between your on-premises network and the Azure virtual network.

Once the connection is established, you can configure your on-premises DNS server to forward requests for the DNS names within the virtual network to the DNS server of the virtual network. Alternatively, you can configure your on-premises devices to use the DNS server of the virtual network as their primary DNS server.