@RLane simple add this section into unattend.xml
<FirstLogonCommands> <SynchronousCommand wcm:action="add"> <CommandLine>REG ADD "HKLM\System\CurrentControlSet\Control\Network\NewNetworkWindowOff" /F</CommandLine> <Order>1</Order> <RequiresUserInput>false</RequiresUserInput> </SynchronousCommand> </FirstLogonCommands>it solve my issue