List of PC's running Office.

[king1]

They were never tied to an MS account back then so there is nowhere you can look, other than on the suspect PCs. I am not sure it will actually help though, I think back then it was just a limit on the total number of installs and how often...

TBH though I would suspect you will have trouble activating it anyway. MS really want you to buy a new version and go out of their way to encourage it