Interesting question. If the LTSC activation key is in the BIOS, then it shouldn't matter if you replace the OEM image with a custom one. To be absolutely sure, please contact a Microsoft distributor to help clarify the question.
Windows 10 IOT LTSC 2019
jose ruan
21
Reputation points
I purchased a device preloaded with OEM Windows 10 IOT LTSC 2019. The device will be deployed with new customized Windows 10 IOT LTSC 2019 image. Will the new image comply as an active Windows license if the Multiple Activation keys (MAK) are already injected in the BIOS?
If it is not compliant then is there a recommended process?