I was doing some quick recovery work and spun up a VM on a Windows 10 box, connected it to the domain, transferred FMSO roles, etc. Got the Hyper-V 2016 (stand alone) spun up. I can't for the life of ...
So we've moved into a 2016 Hyper-V cluster. Several nodes with non-clustered storage. We used to use VMM, but when we moved to this platform, we did not include it. So that's not part of the solution.