I have no idea about the legal situation, however I would like to remind OP that Microsoft is the largest company to accept Bitcoin for some of their products and you are not doing them a favour by selling MSDN. I care a lot less about him violating the ToS of companies that are unwilling to integrate Bitcoin.
This has nothing to do with Microsoft accepting bitcoin please drop this off because this is about someone is selling a MSDN key, that is all, so from your point of view if in some country the people use a lot of pirated version of microsoft does that means Microsoft will be unwilling to sell their products to the country?
To OP, this is an issue about ethical, in Most of the countries , a pirated version is actually being use as the "legal" version, vod thinks this is illegal thus according to what cakir found, even Microsoft isnt really care about this pirated version, so if you could present a solid evidence like this , vod will be willing to remove the negative trust