Hello DEREKYEO,
Unfortunately, yes. It is normally necessary to fulfill the activation process once restored.
But, In this case because you are using Hyper-V and the benefit of AVMA, it can work automatically if you have the AVMA keys preconfigured in the VMs prior to their backup.
AVMA Reference: https://learn.microsoft.com/en-us/windows-server/get-started/automatic-vm-activation
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Hope this helps with your query,
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