Dell EMC Unity: Access based enumeration in Unity

Access-based enumeration is a share-level option that restricts the display of files and folders based on the access privileges of the user attempting to view them. Without access-based enumeration, all users are able to view all files and folders within a directory to which they have access. However they will not be able to open or view these files and folders without the appropriate access privileges. When access-based enumeration is enabled on a share, users will only be able to see files or folders for which they have at least read access or above. For example, without access-based enumeration a user without access to several files would still be able to see that those files exist in a directory to which they have access. However with access-based enumeration, that same user would not even see those same inaccessible files in the directory. Administrator users are always able to see all files and folders, even when access-based enumeration is enabled on a share.

From Unity Unisphere, 

You can configure this feature from the advanced SMB share properties when you create an SMB share or change the SMB share properties. 
Unisphere >> Storage >> File >> SMB Share >> Advanced

For more info about this feature and other Unity NAS Capabilities, please visit link below:
https://support.emc.com/docu81240_Dell-EMC-Unity:-NAS-Capabilities---A-Detailed-Review.pdf?language=en_US