Troubleshoot “connection to KMS server failed” error

Posted by in Computer Tips | Last updated on


I have received a lot of complaint emails saying that they could not activate their program after folowing instructions in my videos. The issues described here are related to an error message they got as below.

The connection to my KMS server failed! Trying to connect to another one… Please wait…
Sorry! Your version is not supported.

There are two main causes of this issue.

1. The cause of client
First of all, please make sure that Windows Update is enabled and your intenret connection is stable. To check if my KMS servers are blocked or not, please open your internet browser then try going to: http://kms8.msguides.com. If the page is visible, it means this server is not blocked.
One other point to note is that you need to run command prompt/batch file with admin rights.

make sure your ran batch file with administrator rights

Otherwise, the connection will be denied by UAC system.

2. The cause of server
Recently I need to do some experiments in the kms7 server so I changed the default KMS port (1688) to another one. And besides, I upgraded CPU and RAM memory on the kms8 server.
Because the number of daily clients is too big and still increasing over time, so the server can also be stuck at times. You can check and see if the server is overloaded or not here: http://status.msguides.com.

If you feel that your problem still hasn’t been fixed yet, just email me at msguides.com@gmail.com.

Troubleshoot “connection to KMS server failed” error
4.4 (17 votes)

If you would have any questions or concerns, please leave your comments. I would be glad to explain in more details. Thank you so much for all your feedback and support!


For faster support, please visit here for troubleshooting. Need more help? Please email me at msguides.com@gmail.com

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72 thoughts on “Troubleshoot “connection to KMS server failed” error

  1. givi

    I tried both methods (manual and with batch file) but none of them works for me. I have the connection to your server, I run as administrator right but it’s rejected anyway. Any solution?

    Reply
  2. Donald

    try this solution -This will 100% work
    by putting the kms file into the root directory ( C:)
    then run the cmd as administrator then done

    Reply
  3. Enigma

    Now that i’m actually subscribing O365, How do i reset the kms to call default microsoft kms instead of kms8.msguides.com? Thanks for anyone’s help.

    Reply
    1. kWong

      KMS is not run by Microsoft. Microsoft only approve KMS Server to activate Windows and Office etc.

      There are no name Microsoft KMS.

      Reply
  4. Marije

    The connection to my KMS server failed! Trying to connect to another one…
    Please wait…

    What can I do to resolve this issue?
    I run the cmd file as administrator, turned off firewall, have stable internet connection

    Reply
        1. kWong

          Top search: Troubleshoot “connection to KMS server failed” error POST

          See have you get same problem?

          Reply
  5. Stana

    Hi Guang,

    Firstly, a word of appreciation for the effort and work you put in this project, thank you 🙂
    Secondly, despite the fact i have followed the steps carefully and repeatedly, i’m failing to get the activation part going for Microsoft Office 2019, i’m running on Windows 10.

    What i did:
    Installed Microsoft Office 2019 through your website:
    https://msguides.com/microsoft-software-products/office-2019.html

    Then proceeded with the activation part, did all the steps of making the .cmd batch file.
    The issue:
    When running the .cmd batch, like most commenting here i get the message:
    Sorry! Your version is not supported. Please try installing the latest version here: bit.ly/aiomsp

    What i have previously done:
    My internet connection is stable and fast.
    I have verified all previous versions were uninstalled.
    That the .cmd batch file was ran as an administrator.
    That Windows Update is enabled, verified by opening your referenced link:
    http://kms8.msguides.com
    And verified that the server is not overloaded per your advice, and it was not.

    i’m out of ideas what to do next to make it work. If you can spare some time to assist me, i would really appreciate your time.

    Reply
  6. Pzd Mubasher

    i also got this error message
    “The connection to my KMS server failed! Trying to connect to another one… Please wait…
    Sorry! Your version is not supported”
    sir what to do now.i have checked your suggesed two main causes but they are not the case..

    Reply
  7. Abhijit Roy

    The Error showing is this @ 15:35 hrs on 18-March-2019 IST

    The connection to my KMS server failed! Trying to connect to another one…
    Please wait…

    ============================================================================

    The connection to my KMS server failed! Trying to connect to another one…
    Please wait…

    ============================================================================

    The connection to my KMS server failed! Trying to connect to another one…
    Please wait…

    ============================================================================
    Sorry! Your version is not supported.

    Reply
  8. Igor DEICHA

    I tried so hard….and Always the same “Sorry, your version is not suported” Pleas help?
    Your script seems to be perfect, it is realy a big invention. But i was not able to put it to work correctely.
    What did I wrong?
    Thanks if you have time to contest.
    Cordialement
    Igor DEICHA

    Reply
  9. Andy

    I am on a 30 day trial Office 365
    The connection to my KMS server failed! Trying to connect to another one… Please wait…
    Sorry! Your version is not supported.
    Do I need to wait until trial runs out?

    Thank you

    Reply
  10. Hrishikanta

    Microsoft Windows [Version 10.0.17134.523]
    (c) 2018 Microsoft Corporation. All rights reserved.

    C:\WINDOWS\system32>slmgr /upk

    C:\WINDOWS\system32>slmgr /ipk W269N-WFGWX-YVC9B-4J6C9-T83GX

    C:\WINDOWS\system32>slmgr /skms kms8.msguides.com

    C:\WINDOWS\system32>slmgr /ato

    C:\WINDOWS\system32>
    after giving successful notification till msguides
    windows can’t activate with the notification
    Activating Windows(R), Professional edition
    (2de67392-b7a7-b1ca-108dd189f588) …
    Error: 0xC004F074 The Software Licensing Service reported that the
    computer could not br activated. No key Management service (KMS)
    could be contacted. Please see the Application Even Log for additional information.

    Reply
    1. Pzd Mubasher

      brother what you do after that….i’m facing the same error message.please tell me i will be very thankfull to you.

      Reply