Hope this helps you out:
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Defining Logon Points
Because logon discovery methods discover computers when they log on to the network, you must specify where on the network you want to discover computers. You do this by specifying a set of logon points. A logon point is a Windows NT domain controller, NetWare NDS container and volume, or NetWare bindery server against which users verify logon scripts. You modify the logon scripts on these logon points to initiate the discovery process. Then, when users log on to these logon points, their computers are discovered.
To specify logon points, navigate to Discovery Methods in the SMS Administrator console:
Systems Management Server
-Site Database (site code - site name)
--Site Hierarchy
---site code - site name
----Site Settings
-----Discovery Methods
In the details pane, right-click the discovery method you want to configure and then select Properties. On the General tab, click New. In the New Logon Point dialog box, specify the identity of the domain, container and volume, or bindery server to use as a logon point.
When you specify a Windows NT domain, SMS installs all domain controllers in the domain as logon points. When a server or volume becomes a logon point, it becomes a site system with the logon point role and appears under Site Systems in the SMS Administrator console.
The logon discovery methods are each paired with an equivalent client installation method (Windows Networking Client Installation, NetWare NDS Client Installation, or NetWare Bindery Client Installation). If you have enabled both the discovery and installation methods, you can also choose to keep the lists of logon points for discovery and installation synchronized. With this approach, changes to the logon points for the discovery method will be reflected in the list of logon points for the client installation method and vice versa. As a result, you can be sure that you are using the same set of logon points for both discovery and installation.
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for more information got to:
and then scroll down a bit
Cheers,
Chris