How To Verify or Check your KMS/MAK Product Key

How To Verify or Check your KMS/MAK Product Key

  • Comments 11
  • Likes

Hello, my name is Scott McArthur. I am a Senior Support Escalation Engineer in the Windows group and today’s blog will cover a common question we get involving product keys. Many times you may have a product key but you need to find out what type of key it is. We will use the VAMT 2.0 tool to accomplish this task. VAMT 2.0 can decode the following types of keys:

  • MAK keys
  • KMS keys
  • Retail keys
  • OEM keys

To determine what type of key you have do the following:

1. Download the Volume Activation Management Tool (VAMT) 2.0 and install it

2. Click Start, All Programs, VAMT 2.0, Volume Activation Management Tool 2.0

3. Click the Product Keys option

clip_image002

Figure 1. VAMT 2.0

4. Enter your Product Key then click Verify.

5. VAMT 2.0 will connect to the internet and verify what type of key you have. For example(I removed my product keys)

clip_image004

Figure 2. VAMT Product Key Output

The following describes the column headings
Key Type:  CSVLK, MAK, Retail, OemCoa, etc…  Note:  CSVLK is a KMS host key
Edition:  The editions (Standard, Enterprise, etc…) the key is valid for
Description:  More detailed description of the key
Remaining Activations:  This column is only valid for MAK keys

Some Common Keys

Windows 7 Home Premium OEM Key
Key Type:  OemCoa
Edition:  HomePremium
Description:  Windows 7 Home Premium OEM:COA

Windows 7 Ultimate Retail Key
Key Type:  Retail
Edition:  Ultimate
Description:  Windows 7 Ultimate Retail

Windows 7 MAK key
Key Type:  Mak
Edition:  Enterprise;EnterpriseN;EnterpriseE;Professional;ProfessionalN;ProfessionalE
Description:  Windows 7 All Volume Editions Volume:MAK

Windows 7 KMS Host Key
Key Type:  Csvlk 
Edition:  Enterprise;EnterpriseN;EnterpriseE;Professional;ProfessionalN;ProfessionalE
Description:  Windows 7 All Volume Editions Volume:CSVLK

Windows Server 2008 R2 MAK_B
Key Type:  Mak
Edition:  ServerStandard;ServerEnterprise
Description:  Server 2008 R2 Std and Ent Volume:MAK (MAK_B)

Windows Server 2008 R2 KMS_C
Key Type:  Csvlk 
Edition:  ServerDatacenter;ServerEnterpriseIA64;ServerEnterprise;ServerStandard;ServerWeb;ServerHPC
Description:  Server 2008 R2 DC and IA64 Volume:CSVLK (KMS_C)

Windows Server 2008 R2 KMS_B
Key Type:  Csvlk
Edition:  ServerStandard;ServerEnterprise;ServerWeb;ServerHPC
Description:  Server 2008 R2 Std and Ent Volume:CSVLK (KMS_B)

Entering all your keys into VAMT 2.0 is a good way to save your productkeys and be able to reference them easily. VAMT 2.0 is a powerful tool that you can use for many other activation functions. For more information on VAMT 2.0 click Help to see the included helpfile.

Scott McArthur
Senior Support Escalation Engineer
Microsoft Enterprise Platforms Support

Your comment has been posted.   Close
Thank you, your comment requires moderation so it may take a while to appear.   Close
Leave a Comment
  • I have a slightly different issue maybe you could help with.  We have several different 2008 product keys.  When our servers were created, no-one ever kept track of which keys were used with each server.  Is there a way I can view the product key on the servers so I can record what product keys were used where?  If not, what is the best method recommended by Microsoft to address this issue?

  • @brodiemac:  Magic Jellybean is your friend...

  • Thanks, great info!

  • excellent bossss...

  • @Easter Rabbit, @Athos, @asjad Magic Jellybean is cool, but if all you want to grab are Windows product keys, ProduKey is free and work great.

  • Doesn't install

  • Awesome features and techniques illustrated by jeff. Thanks

  • there is a way to validated office key to see if they are active or not for IT resource bussiness?

  • I'm just wondering is there a way to check keys like Posready 2009/7, Wepos, Embedded, XP sp3 embedded?

    Because 1 of my keys got blocked and i still have about 200 licenses left so something went wrong.

  • Have an Office 2013 key that I THOUGHT was an Enterprise key; Activated it in 2013; had a crash reactivated. DESPISE 2013 so I removed it. I remember TALKING to an MS person and THEY helped me activate it. Does that still exist? The Volume Activation Manager from MS says this key is no good. ANYONE? kctobyjoe@Comcast.net