I had a an old Lotus/Domino server (R5), I just virtualized. It ran Windows 2000 server. I had to use Vmware Converter v3.x to create the vm because it was the only one I could find that could actually do a Win2k machine that had no service packs. It was just put out to pasture a couple months ago, so it isn't being used except to store the old email for archiving. It took a bit of work to get it onto the Win2008R2 servers hyper-v but I got it there.
EDIT: Forgot to mention I used VMDK2VHD to convert the vmdk to a vhd.
Problem now, is that the network adapter didn't show up. I could not install the guest additions because it needed sp4 + on win2k... so I installed sp4 onto the vm guest.
Everything seems fine except the network adapter still isn;t showing up in device manager. NOthing. Now this server had an external ip, and I did not want it to be put onto the internal virtual network. I am going to use a dedicated adapter on the host (hyper-v server) if that matters... but this shouldn't matter if the the guests network adapter doesn't show at all.
Device Mananger "show hidden devices" I get the following:
I also loaded the vmdk file into VMWare PLayer, and no network adapters displayed. Results were the same as the image. So the problem isn't VMDK2VHD.