Problem with Product Activation Portal activation for Windows 11 Enterprise MAK

Hi Colin Cory,

Thank you for sending your problem to us.

The error message "Can't activate Windows by phone" typically occurs when the operating system's UI component for phone activation is bypassed or when the underlying licensing service (slui.exe) fails to hand off the Confirmation ID (CID) to the Software Protection Service.

To address your question: Yes, it is entirely possible to activate Windows 11 Enterprise MAK via the Product Activation Portal, *but you must ensure the CID is injected correctly through the Command Prompt if the graphical user interface (GUI) rejects the entry.

*My recommended resolution:

1. Open an Elevated Command Prompt:
   Click Start, type cmd, right-click it, and select Run as Administrator.
2. Verify the Installation ID (IID):
   Ensure the Installation ID you provided to the portal matches the current state of the machine by running:
   slmgr.exe /dti
   (Confirm this matches the ID you used to generate the CID).
3. Deposit the Confirmation ID:
   Instead of using the "Activate by phone" UI, manually inject the Confirmation ID provided by the portal using the following command:
   slmgr.exe /atp [YourConfirmationID]
   Note: Replace [YourConfirmationID] with the 48-digit string obtained from the portal, without hyphens.
4. Commit the Activation:
   Once the CID is deposited, verify the license status by running:
   slmgr.exe /dlv

If you find the answer useful, please mark it as the "Accepted Answer" so other members can find the solution easily. Your help in supporting the community is much appreciated!

Best regards,
Scott Nguyen