$dnsServers = ("192.168.111.3","192.168.111.4")
Get-VMHost | Get-View | %{
$ns = Get-View -Id $esx.configManager.networkSystem
$dns = $ns.networkConfig.dnsConfig
$dns.Address = @()
foreach($server in $dnsServers) {
	$dns.Address += $server}
$ns.UpdateDnsConfig($dns)
}