Is there a known way to change existing Windows 10/11 devices from KMS client activation to Azure AD Education A3 / A5 or Enterprise E3 / E5 license activation?
Apparently when Windows 10/11 devices are being imaged and joined to Azure AD for pure cloud management, if they can find a local KMS licensing server within your local LAN, they will automatically join to that first before attempting to license online during the Azure AD join.
Once joined to the local LAN KMS license server, these Windows client devices then apparently will not let go of the KMS activation method by themselves, and change to Azure online licensing, even if the KMS license server is disabled or blocked behind a firewall and the KMS license activation has expired.
Removing the previous onsite KMS client key and KMS DNS name from a Windows 10 device, and then rearming using slmgr.vbs, does not seem to be the correct way to change it to Azure based licensing.
Attempting to then reapply the Windows 10 Education default client setup key NW6C2-QMPVW-D7KKK-3GKT6-VCFB2 from Microsoft's Appendix A documentation, apparently makes it try to find a local KMS server again, rather than attempt to activate online through Azure AD.
Reference: https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/jj612867(v=ws.11)
Something more is needed. Apparently there is no such thing as an Azure AD KMS client setup key?