Why would Microsoft be blocked?

I wonder why corporate network admins would block Microsoft. I
just upgraded to the latest version of the Tor proxy server,
and can see where users go in real time.

Someone appeared to have been using it to circumvent a company
firewall to access the Microsoft web site.

Now that does not make any sense. What network admin, in
their right mind, would block Microsoft and keep computers
from receiving important updates.

Il mittente di questo messaggio|The sender address of this
non corrisponde ad un utente |message is not related to a real
reale ma all'indirizzo fittizio|person but to a fake address of an
di un sistema anonimizzatore |anonymous system
Per maggiori informazioni |For more info