Access denied – hyper-v 2012

It is called configuration only export / import. Did you check this article by Ben Armstrong, Hyper-V Program Manager? Similar solutions are also described here and here.

After a couple of days of researching I think I've found the answer, and it was actually an issue with Hyper-V. Just to preset what was happening before I answer, I was attempting to optimize the host's network for Hyper-V. More on that can be found here.

Well, as part of the optimizations one of them was to add two registry entries. They are BelowTenGigVmqEnabled (also TenGigVmqEnabled) and BelowTenGigVmChimneyEnabled (also TenGigVmChimneyEnabled) to HKLM\SYSTEM\CurrentControlSet\services\VMSMP\Parameters. If those settings exist before you try to create a Hyper-V virtual network with a teamed adapter, you will get the permissions error. From what I saw, physical adapters don't have an issue if the settings exist or not when you create a virtual network out of them.

The proper way of using these settings is to configure the virtual network with Hyper-V then add the settings in and it all works fine. Also, I'm not sure if it was one or the other, but to be on the safe side I removed both, configured the virtual network, then added them back. I hope this helps someone.