Host1 can reach the on-premises 192.168.10.0/24 network but cannot reach App1 on the new on-premises 192.168.11.0/24 network. Which setting should you modify to allow Host1 to access App1?

The correct answer is the Configuration settings of LNGW1. To allow Host1 (in Azure) to reach the new on-premises network (192.168.11.0/24), the Local Network Gateway (LNGW1) needs to be updated. LNGW1 represents the on-premises network to Azure. Its configuration must include all on-premises address prefixes that Azure resources need to reach. Adding the 192.168.11.0/24 network to LNGW1's address spaces will update the Azure VPN gateway's routing table, enabling traffic from VNet1 to flow to the new on-premises subnet. The Connections settings of VPNGW1 define the VPN tunnel itself but don't dictate the routable on-premises networks. The Subnets setting of VNet1 defines Azure subnets, not on-premises ones. DNS server settings of VNet1 resolve names, not route IP traffic. RDP Properties of the host pool are for client connection settings to AVD hosts, irrelevant to network routing.