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Key Management Service

tags: PowerShell categories: System-Engineering

Table of Contents

Get KMS from Registry

How to obtain the registered KMS server from the registry:

Get-Item 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform'

The KMS Server is list on KeyManagementServiceName.

Get KMS from DNS

nslookup -type=SRV _vlmcs._tcp

Server:  dnsserver.firma.tld
Address:  10.1.1.1.

_vlmcs._tcp.firma.tld   SRV service location:
          priority       = 0
          weight         = 0
          port           = 1688
          svr hostname   = dc1.firma.tld
dc1.firma.tld  internet address = 10.1.2.3

The KMS Server is list on svr hostname.

Get KMS from Software licensing service

How to obtain the registered KMS server from the Software licensing service (slmgr):

cscript "$($env:windir)\system32\slmgr.vbs" -dlv //Nologo

The KMS Server is list on ‘KMS machine IP address’.

Get KMS from CIM Class

How to obtain the registered KMS server from the Software licensing class:

$properties = @('Name', 'Description', 'PartialProductKey', 'ProductKeyChannel', 'trustedTime', 'KeyManagementServiceMachine', 'KeyManagementServicePort')
Get-CimInstance -Class SoftwareLicensingProduct -Filter 'ProductKeyId != NULL' | Where-Object {
    ($_.LicenseStatus -eq 1 -and $_.Name -match 'Windows')
} | Select $properties

Notice that LicenseStatus 1 is licensed, 0 is not licensed.

The KMS Server is list on ‘KeyManagementServiceMachine’.

List KMS Events from Applicationlog

function Get-KMSEvents{
    <#
        Get events in the last 24 hours with id 12288 or id 12289 from Applicationlog
    #>
    $function = $($MyInvocation.MyCommand.Name)
    try{
        write-host "`nGet KMS Eventlogs:"
        [DateTime]$now = Get-Date
        [DateTime]$after = $now.AddHours(-12)
        [DateTime]$before = $now
        $events = Get-EventLog 'Application' -After $after -Before $before | where {$_.eventID -like 12288 -or $_.eventID -like 12289} | Select TimeGenerated,Message
        if($events -ne $null){
            write-host "`nGet Activation Information from Applicationlog:"
            $events | % {"$($_.TimeGenerated) $($_.Message)"}
        }
    }
    catch [Exception]{
          write-host "$($function): $($_.Exception.Message)" -ForegroundColor Red
          $error.clear()
    }
}

See also

How to troubleshoot the Key Management Service (KMS)

IDERA Managing Windows License Key

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