In the console tree, click the server or publishing point for
which you want to enable the plug-in.
In the details pane, click the Properties tab.
In Category, click Authorization.
In Plug-in, click WMS NTFS ACL Authorization, and
then click the Enable button.
The authentication and authorization plug-ins
work together to grant clients access to streaming media content.
If an authorization plug-in is enabled, but no authentication
plug-in is enabled, unicast clients cannot access the server.