Hello,
Regarding your inquiry, the Windows 10 IOT 2021 LTSC Multileg ESD OEI High End license is a perpetual license that is tied to the device it was originally installed on. This means that it cannot be transferred to another device in an official way. If you are an end user, the OEM should have provided you with the terms of the license agreement.
More details you can refer to this link:
https://learn.microsoft.com/en-us/windows/iot/iot-enterprise/commercialization/licensing
Best Regards,
Hania
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