Moving a profile not transparent for Windows 2012 R2

[el pinco]

We are moving our blades from an enclosure to another one;  all enclosure belongs to the same VCEM domain group. We are using Flexfabric 10gbs with firmware 4.4, hosts are BL460C Gen8.

When moved in the new location some hosts with Windows 2012 R2 running HyperV, they are discovering new network devices, even if the mac address is still the same: there are the old NIC and the new ones. We already moved a lot of linux and vmware servers, without troubles.

Does someone has already seen this strange behavior?

thank you,

all the best