Computer Configuration > Policies > Centrify Settings > Mac OS X Settings > Services > Enable Personal File Sharing
Allow users on other Mac computers access to
Public folders on the local computer. If you enable this group policy, all users can access files in the
Public folder through the Apple File Sharing protocol. Users with appropriate permission can also access other folders on the local computer if properly authenticated.
Enabling this group policy is the same as opening the Sharing system preference, selecting File Sharing, then clicking the Options button and selecting the Share Files and Folders using AFP option.
On Mac OS X Servers, enabling this policy has no effect.
This policy can take effect dynamically at the next group policy refresh interval without rebooting the computer.