Static Mac adress on guest machine

Hi All,
I must convert a Windows 7 machine from VMware to a Hyper-V Cluster. But the Problem is that we Need to Keep the old MAC Adress on this Client after conversion. How can I do this?
From my understanding means static IP in Hyper-V only that always the same MAC Adress will be assigned to the guest from the pool.
But ist very important for us to keep the old one ...
Hope someone has an idea here ...
Many thanks
markus

Thanks...
The Hyper-V Guest is running on a Cluster. Is it correct that the MAC address Settings should be leave in Dynamic then?
I have converted now the machine. And the strange Thing is that the MAC Settings for this machine are automaticly set to static with the correct MAC Adress (Spoofing is disabled)
the machine is running on a Hyper-V Cluster 2008R2 and i have converted the machine with SCVMM.
Can this be working like this ?
Rgds,
markus

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