Click the server that you want to deny unicast connections
In the Windows Media Services snap-in, on the Action
menu, click Deny New Connections.
In Windows Media Services Administrator for the
Web, click the Deny button.
New requests for unicast streams will be
If you are delivering the content as both
unicast and multicast streams from a broadcast publishing point,
players will still be able to receive multicast streams from the
server after you deny unicast connections. You must stop either the
server or the publishing point if you do not want players to
receive the multicast stream.