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Activation of windows offline

Denish Lily 0 Reputation points
2026-04-22T05:06:16.0733333+00:00

I am writing to seek guidance regarding the activation of Windows 11 after or 24 H2 version on standalone machines within our organization.

These systems are not connected to the internet due to organizational security policies. Previously, we were able to activate Windows via phone using the activation portal (https://aka.ms/AOH). However, this method no longer appears to be working.

We do have the Installation IDs available for these systems. Could you please advise on the current process for activating Windows in such offline environments?

Windows for business | Windows Client for IT Pros | Devices and deployment | Licensing and activation

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  1. Harry Phan 21,175 Reputation points Independent Advisor
    2026-04-22T06:43:36.3966667+00:00

    Hi Denish,

    Microsoft has retired the legacy phone-based activation method for standalone systems, including the portal at aka.ms/AOH. For Windows 11 24H2 and later, offline activation is only supported through Key Management Service (KMS) or Active Directory–based activation within a connected environment. On isolated networks, the supported approach is to use Volume Activation Management Tool (VAMT) with proxy activation, where you export the Installation IDs from the offline machines, perform activation on a system with internet access, and then import the Confirmation IDs back to the offline systems. This workflow requires volume license keys (MAK or KMS) and VAMT 3.1 or newer.

    If your organization is using retail or OEM licenses, there is no longer a supported offline activation path; those editions require internet connectivity to Microsoft activation servers. In that case, the only compliant option is to temporarily allow outbound activation traffic or move to volume licensing with VAMT for offline scenarios. If you already have Installation IDs, you can proceed with VAMT’s proxy activation method, but the phone activation channel is no longer available.

    If the above response helps answer your question, please hit "Accept Answer" so that others in the community facing similar issues can easily find the solution. Your contribution is highly appreciated.

    Harry.

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  2. AI answer

    2026-04-22T05:06:32.6666667+00:00

    For offline (standalone) Windows clients where the old telephone/activation portal flow is no longer working, the supported replacement is the Product Activation Portal, which supports both connected and non‑connected devices and continues to allow offline activation using Installation IDs.

    The current high‑level options for offline environments are:

    1. Use the Product Activation Portal for offline activation (perpetual licenses)
      Microsoft has moved the traditional telephone-based product activation automation to an online portal, while still supporting offline activation:
      • Go to the Product Activation Portal (human operator required).
      • Sign in with any supported account type (personal Microsoft account, work or school account, Microsoft Entra ID, or Azure Government tenant account). The sign‑in account is only for secure portal access and is not tied to the product license.
      • Use the portal workflow to submit the Installation ID from the offline machine and obtain the Confirmation ID.
      • Enter the Confirmation ID on the offline machine using the standard Windows activation UI or slui flow as appropriate for that edition.
      This replaces the automated phone system but preserves the offline activation pattern: Installation ID → Microsoft → Confirmation ID → apply on offline device.
    2. Use VAMT with MAK proxy activation for multiple offline clients (volume licensing)
      For organizations with volume licenses (MAK/KMS) and many offline machines, the Volume Activation Management Tool (VAMT) can centralize activation:
      • Install and configure VAMT on a server that has Internet access.
      • On each offline client, install the appropriate MAK (or other supported) key.
      • Use VAMT to collect Installation IDs from the offline clients (via export/import or secure network segments, depending on policy).
      • On the Internet‑connected VAMT host, perform MAK proxy activation: VAMT sends the Installation IDs to Microsoft and retrieves Confirmation IDs in bulk.
      • Import/apply the Confirmation IDs back to the offline clients via VAMT.
      This method is specifically designed for isolated networks and mixed environments where clients cannot talk directly to Microsoft activation services.
    3. If using Windows 10 Pro for Workstations or Windows 10 Pro EDU
      These editions must be activated over the Internet and do not support phone activation or SLUI 04 for usable IDs. Command‑line tools such as slmgr.vbs also cannot inject keys for these editions. For such SKUs, an Internet path (even temporary/controlled) is required for activation.

    In summary, for standalone offline machines with Installation IDs, the supported path is to use either:

    • The Product Activation Portal to manually exchange Installation ID ↔ Confirmation ID, or
    • VAMT MAK proxy activation for centralized, bulk offline activation in a volume‑licensed environment.

    References:

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