Subscription linked to hybrid Entra tenant contoso.com. You created host pool HP01 and will deploy session hosts to VNet01 that must join contoso.com. To minimize administrative effort, what should you configure first?

The correct answer is the DNS servers settings of VNet01. For session hosts to join an on-premises Active Directory domain (contoso.com) from an Azure Virtual Network (VNet01), they must be able to resolve the domain controller's DNS records. Configuring the VNet's DNS settings to point to your on-premises DNS servers (or Azure DNS Private Resolver) ensures this name resolution. Without proper DNS resolution, the domain join operation will fail, significantly increasing administrative effort to troubleshoot. Incorrect options: The RDP Properties settings of HP01 are for configuring remote desktop experience, not domain join. The default subnet settings of VNet01 define IP address ranges and network security groups, but not DNS resolution for domain join. The Configuration settings of VPN01 (assuming this refers to a VPN gateway) are for establishing connectivity, but DNS resolution still needs to be explicitly configured for the VNet.