IP-адреса для серверов Windows Azure, кажется, из США, когда серверы, как предполагается, расположены в Европе

GeoIP isn't accurate for every IP address. MaxMind do take submissions, though, when you find an error.

I tracerouted a random IP address in that subnet and wound up in Amsterdam. Without a specific IP address, or at least a traceroute output, I don't think anybody but Microsoft could say. And they'll ask for one or both of those, as well.