The danger comes from Microsoft. If there's an audit and it's discovered that you are using pirated keys, that can coat the company a bunch of moneys
Now Microsoft is not quite as anal with those as some other companies (uh, Oracle for example) but it's still not good
Honestly, I'd just suggest going to your IT and tell that you fucked around and broke things. The IT guys have seen that (in different ways) so many times it shouldn't really be a too big deal. Way worse if you try to hide it