Hello
Thank you for your question and reaching out. I can understand you are having query\issues related to Hyper-V Migrate.
All three options are possible , but they will depends on how Big your VM , Data and resources you have.
As there is no Trust between two Domains you can Do Export then Import your VMs to new Cluster.
OR
Use the built-in Microsoft “Shared Nothing Live Migration” to migrate VMs to new cluster.
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