USAGE: Dfsutil /Insite can be used to exclude or include folder (link) targets outside the client's site. If /Insite is enabled ...

USAGE:
Dfsutil /Insite can be used to exclude or include folder (link) targets outside
the client's site. If /Insite is enabled and no same-site targets exist, the client 
does not receive a referral and cannot access that portion of the namespace.

Usage: 
dfsutil /Path: /InSite /Enable|Disable|Display [/Verbose]
    
    /Path: - Path of DFS root or link affected.
    /Display - Determine whether INSITE_REFERRALS is currently enabled for the
            specified path
    /Enable - Restrict client access to servers within their site.
    /Disable - Let clients access all replicas of this specified path
    /Verbose - Show additional information while the tool is executing.    

Notes:
1) You must specify Enable, Disable, or Display.
2) The path specified may be a namespace server (root) or a folder (link).
3) To enable or disable the /Insite parameter on a domain controller, in 
Registry Editor browse to HKLM\SYSTEM\CurrentControlSet\Services\Dfs\Parameters, 
and then set the InsiteReferrals REG_DWORD value to 1 or 0.