Hi, Our company need to reformat our 2 servers with hyper V, done with the 1st server, how can we registered or activate it again using our previous license key? I have the screenshot of computer properties it needed.

Since you're using volume license product keys you should have also used volume center download so the channels line up. As a work around you can try using kms keys as intermediate step.
https://learn.microsoft.com/en-us/windows-server/get-started/kmsclientkeys#windows-server-2012-r2

(below assumes 2012 R2 Standard)

Dism /online /Set-Edition:ServerStandard /AcceptEula /ProductKey:D2N9P-3P6X9-2R39C-7RTCD-MDVJX

then after reboot

(below using your volume product key)

slmgr /ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
slmgr /ato

--please don't forget to Accept as answer if the reply is helpful--

Is there an update?

Awesome, it's worked. Thank's a lot

Hi @lovel echiverri

Seems you missed to pull the product key from machine 1 before rebuild...

From machine 2 :command prompt as administrator --- wmic path softwarelicensingservice get OA3xOriginalProductKey

slmgr /ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx

slmgr /ato

above commands should tell you original licenses /product keys

---

Frm machine 2 ---

Open Notepad.
Copy and paste the following text into the notepad window

function Get-WindowsKey {
## function to retrieve the Windows Product Key from any PC
## by Jakob Bindslet (******@bindslet.dk)
param ($targets = ".")
$hklm = 2147483650
$regPath = "Software\Microsoft\Windows NT\CurrentVersion"
$regValue = "DigitalProductId"
Foreach ($target in $targets) {
$productKey = $null
$win32os = $null
$wmi = [WMIClass]"\$target\root\default:stdRegProv"
$data = $wmi.GetBinaryValue($hklm,$regPath,$regValue)
$binArray = ($data.uValue)[52..66]
$charsArray = "B","C","D","F","G","H","J","K","M","P","Q","R","T","V","W","X","Y","2","3","4","6","7","8","9"
## decrypt base24 encoded binary data
For ($i = 24; $i -ge 0; $i--) {
$k = 0
For ($j = 14; $j -ge 0; $j--) {
$k = $k * 256 -bxor $binArray[$j]
$binArray[$j] = [math]::truncate($k / 24)
$k = $k % 24
}
$productKey = $charsArray[$k] + $productKey
If (($i % 5 -eq 0) -and ($i -ne 0)) {
$productKey = "-" + $productKey
}
}
$win32os = Get-WmiObject Win32_OperatingSystem -computer $target
$obj = New-Object Object
$obj | Add-Member Noteproperty Computer -value $target
$obj | Add-Member Noteproperty Caption -value $win32os.Caption
$obj | Add-Member Noteproperty CSDVersion -value $win32os.CSDVersion
$obj | Add-Member Noteproperty OSArch -value $win32os.OSArchitecture
$obj | Add-Member Noteproperty BuildNumber -value $win32os.BuildNumber
$obj | Add-Member Noteproperty RegisteredTo -value $win32os.RegisteredUser
$obj | Add-Member Noteproperty ProductID -value $win32os.SerialNumber
$obj | Add-Member Noteproperty ProductKey -value $productkey
$obj
}
}

Save the text above into a file with the ".ps1" extension on the Desktop. Example key.ps1

Open the Powershell console as administrator and type in Set-ExecutionPolicy RemoteSigned

Next type in Import-Module C:\users\"username"\desktop**key.ps1**; Get-WindowsKey

=====

(If the reply was helpful please don't forget to upvote and/or accept as answer, Thank You)

Regards,
J.D.

Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

hi @JoyDutt , thanks for the reply, i though it can be activated buy simply re-entering the previous license key which was a VLS product, and now expired, so in my case, does it means i need to purchase a new license again to have it activate?

i though it can be activated buy simply re-entering the previous license key

What happens when you try?

hi @Anonymous , it gives an error, something like "not a valid license key" I am trying to get in touch with microsoft support, still waiting for their call though....

What is the source of installation media?

@Anonymous downloaded from microsoft site, the 2012r2 standard 180 days evaluation ISO

@Anonymous tried your suggestion, and gives an error "invalid key", when i tried this command "slmgr /ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx", I guess once the VLS is expired, it wont work.

Maybe you installed DataCenter?

--please don't forget to Accept as answer if the reply is helpful--

Dism /online /Set-Edition:ServerStandard /AcceptEula /ProductKey:D2N9P-3P6X9-2R39C-7RTCD-MDVJX when I run this, give an error, and gives a hint to try get-targetedition, which i did, and instead of "Set-Edition:ServerStandard" change it to "Set-Edition:Serverdatacenter" just to execute the command, i guess i messed it up, just got the datacenter edition, will try to reinstall again using this.

Sounds good.

@lovel echiverri
Hi,

You could try the following steps:

1. Find the suitable generic key for your operating system from the below link
   https://technet.microsoft.com/en-us/library/jj612867.aspx
   You could pick the windows server 2012 R2 KMS key from the above link
2. Use the key in the following command. Make sure you are running the below command from elevated command prompt. 
   DISM /Online /Set-Edition:ServerStandard /ProductKey:D2N9P-3P6X9-2R39C-7RTCD-MDVJX /AcceptEula
   reboot the server when prompted
3. Once the server is rebooted, try the volume license key from system properties or use SLUI 3 command 

Hope above information can help you.

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hi @Jenny Feng , i trying to execute this command, DISM /Online /set-ProductKey:W3GGN-FT8W3-Y4M27-J84CP-Q3VJ9 /AcceptEula but it's giving an error "setting the product key is not supported with online image", i guess i need to reformat again the server to run this command "DISM /Online /Set-Edition:ServerStandard /ProductKey:D2N9P-3P6X9-2R39C-7RTCD-MDVJX /AcceptEula"
thanks for all the help im getting...

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