Access-Based Enumeration enables users to see only a subset of files or directories to which they have access permissions when browsing content, versus seeing the complete set of files and folders. ABE enables comingling of files/folders utilizing file access-permissions to restrict visibility and access.

CIFS shares on Shared File Services can have ABE enabled. For more information on ABE, see the definition from Microsoft: http://technet.microsoft.com/en-us/library/dd772681%28v=ws.10%29.aspx.