Hyper-v cluster crossforest VM migration

Planning installing new hyper-v cluster, crossforest migration as a part of other project is already in place, so now instead of adding hosts to old forest i think it is better to ad them to a new forest and migrate the VM-s to new cluster.
Couple of questions:

Old : Hyper-v Serevr 2012 R2 cluster
New : Hyper-v server 2016 cluster

i'm lucky enough to have enough storage to create additional csv just for the new cluster.

i'm having SCVMM in old forrest, should i create new SCVMM in new forrest and use it for the migration ?
any suggestions on a no downtime migration... what are the options...

thanks
oompaloompaAsked:
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Shared Nothing Live migration would be the way to do it.

It's relatively simple and works just fine. BTDT

EDIT: Tired brain here, but another option would be Hyper-V Replica using HTTPS instead of Kerberos.
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oompaloompaAuthor Commented:
going further, the problem with SNLM is that credentials can't be passed to another cluster(in another forest) kerberos doesn't work in that case so currently stuck while trying to figure this out....


EDIT : getting some progress with move-vm thru powershell, waiting to see the end result, but LM started
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
A cross forest trust should allow for it just make sure Constrained Delegation is set up between hosts on both sides.
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