What a pain. Have Mac Office 2011, it is very restrictive on activation, so have lost a few hard drives and now when I try to activate it says too many times, but there is no way in the interface to reset activations and when you try to call on the phone, it just fails you and says you have to call back later. So there is no human way to do this either.
I just love the Apple policy, freeer use can mean more purchases. Like Lion being $29 and via App Store, so much simpler. But I presume the curve for Office is inelastic, so this makes sense :-*(