$NTPServers = "10.1.1.1","10.1.1.2" Get-Cluster "MyCluster\*" | Get-VMHost | Sort Name | %{ $\_ | Remove-VMHostNtpServer -NtpServer ($\_ | Get-VMHostNtpServer) -Confirm:$false $\_ | Add-VMHostNtpServer -NtpServer $NTPServers $\_ | Get-VMHostService | Where-Object {$\_.key -eq "ntpd"} | Restart-VMHostService -Confirm:$false }