Hi,
I am having the same problem. Actually, I have for some time but I haven't addressed it.
Now, I'm in trouble. Office refuses to activate my software due to excessive activations (basically, I let it authenticate every time I switch between a physical boot and a virtual boot) which I should have seen coming.
Now, Windows is whining too.
The problem is the same as the OP. Every time I change between physical and virtual, Office and Windows thinks I'm changing computers and wants to reactivate.
I should have addressed this sooner. Please help.