It's from a customer. I don't really know the details. Sorry.
Currently Hyper-V doesn't support Unrestricted Guests for nested hypervisors (but
I suppose it would be supported soon) and the customer saw a warning about this
in the compatibility check script. It looks we can ignore the warning, but I'd like
know if there would be any consequence.
Currently Clear Containers (CC) 3.0 could be run in Azure platforms, you need
to be sure that the platforms has nested vitalization capable.
Regarding Hyper-V, CC-2.X needs some tweaks to run on top of it, but you
can try with CC-3.0.
Pleas ask to your costumer to try CC-3.0
As CC-3.0 is out CC team is deprecating CC-2.X.
Miguel Bernal Marin Open Source Technology Center