Access-based enumeration hides files and folders that users do not have permission to access. By default, this feature is not enabled for DFS namespaces. You can enable access-based enumeration of DFS folders by using DFS Management. To control access-based enumeration of files and folders in folder targets, you must enable access-based enumeration on each shared folder by using Share and Storage Management.
To enable access-based enumeration on a namespace, all namespace servers must be running Windows Server 2008 or newer. Additionally, domain-based namespaces must use the Windows Server 2008 mode. For information about the requirements of the Windows Server 2008 mode, see Choose a Namespace Type.
In some environments, enabling access-based enumeration can cause high CPU utilization on the server and slow response times for users. For more information, see the Microsoft Web site (http://go.microsoft.com/fwlink/?LinkId=140356).
