This script checks the values of specific registry keys based on recommendations from Vmware for virtualized PDC Emulators.

Test-W32tmBPA.ps1

<#
    .SYNOPSIS
        Check stored values of w32tm against Vmware recommendations
    .DESCRIPTION
        This script checks the values of specific registry keys based
        on recommendations from Vmware for virtualized PDC Emulators.
        
        For more details please see pages 5 and 6 of this Vmware white
        paper (http://www.vmware.com/files/pdf/Virtualizing_Windows_Active_Directory.pdf)
    .PARAMETER Type
        This determines from which peers W32Time will accept
        synchronization. When the REG_SZ value is changed from
        NT5DS to NTP, the PDC Emulator synchronizes from the list of
        reliable time servers specified in the NtpServer registry key.
    .PARAMETER NtpServer
        This entry specifies a space-delimited list of stratum 1 time
        servers from which the local computer can obtain reliable
        time stamps. The list can use either fully-qualified domain
        names or IP addresses. (If DNS names are used, you must
        append ,0x1 to the end of each DNS name.)
    .PARAMETER AnnounceFlag
        This entry controls whether the local computer is marked as
        a reliable time server (which is only possible if the previous
        registry entry is set to NTP as described above). Change the
        REG_DWORD value from 10 to 5 here.
    .EXAMPLE
        Test-W32tmBPA.ps1 -Type NTP -NtpServer 'time.windows.com,0x1','tock.usno.navy.mil,0x1' -AnnounceFlag 5
    .NOTES
        ScriptName : Test-W32tmBPA
        Created By : jspatton
        Date Coded : 03/12/2015 11:20:09
    .LINK
        https://gist.github.com/jeffpatton1971/a69407bf3241c9dc4014
    .LINK
        http://www.vmware.com/files/pdf/Virtualizing_Windows_Active_Directory.pdf
#>
[CmdletBinding()]
Param
(
[string]$Type = "NTP",
[string[]]$NtpServer = ('time.windows.com,0x1','tock.usno.navy.mil,0x1'),
[int]$AnnounceFlag = 5
)
Begin
{
    Write-Verbose "Get Parameters key from registry";
    $Parameters = Get-Item HKLM:\System\CurrentControlSet\Services\W32Time\Parameters;
    Write-Verbose "Get value of Type key";
    $rType = $Parameters.GetValue("Type");
    Write-Verbose "Get value of NtpServer key";
    $rNtpServer = ($Parameters.GetValue("Ntpserver")).Split(" ");
    Write-Verbose "Get Config key from registry";
    $Config = Get-Item HKLM:\System\CurrentControlSet\Services\W32Time\Config;
    Write-Verbose "Get value of AnnounceFlags key";
    $rAnnounceFlags = $Config.GetValue("AnnounceFlags");
    $TypeValue = $true;
    $AnnounceFlagValue = $true;
    $NtpServerValue = $true;
    }
Process
{
    Write-Verbose "Check Type stored in registry vs Type parameter";
    if (!($Type -eq $rType))
    {
        $TypeValue = $false
        }
    Write-Verbose "Check AnnounceFlags in registry vs AnnounceFlag parameter";
    if (!($AnnounceFlag -eq $rAnnounceFlags))
    {
        $AnnounceFlagValue = $false
        }
    Write-Verbose "Check NtpServer in registry vs NtpServer parameter";
    $rNtpServer |ForEach-Object
    {
        if (!($NtpServer -contains $_))
        {
            $NtpServerValue = $false
            }
        }
    }
End
{
    if (!($TypeValue))
    {
        Write-Host "Invalid Type found : $($rType)";
        }
    if (!($AnnounceFlagValue))
    {
        Write-Host "Invalid AnnounceFlags found : $($rAnnounceFlags)":
        }
    if (!($NtpServerValue))
    {
        Write-Host "Invalid NtpServer found : $($rNtpServer)";
        }
    }