Activate Windows 2019 Core without internet access

Romar 106 Reputation points


I recently installed Windows 2019 Core and it has no access to the internet.
Is it possible to activate Windows 2019 Core over the phone, because the SLUI 4 command doesn't seem to work.

Can someone please point me to the right direction?

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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  1. Teemo Tang 11,371 Reputation points

    After you’ve logged into Windows Server Core, you’re presented with the Command Prompt. From there, you can activate your copy of Windows.
    At a windows prompt type the following and read the instructions carefully.
    This will allow you to obtain an activation code by phone from the license center and do an offline activation.
    The license center will help you to set up a batch activation from a file or, at least they used to be helpful with this.

    Here's the breakdown of what to do, for anyone reading this later.
    slmgr <computer name> /ipk <product key>
    slmgr <computer name> /dti
    (This will give you a popup box with a long string, which you'll have to submit for activation; I prefer using the mobile website. The string doesn't have spaces or dashes, so be careful to get it right)
    slmgr <computer name> /atp <activation id>



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  1. SUNOJ KUMAR YELURU 14,016 Reputation points MVP

    Hi @Romar

    Refer below article hopefully it will help you.
    Activate an offline Windows Server using the Windows Product Activation Center

    Please don’t forget to Accept the answer and up-vote wherever the information provided helps you, this can be beneficial to other community members.

  2. Anonymous

    You can follow along here.

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