Specify which users have access to files, folders, items, and custom objects as well as the access level by assigning members to the Access Control List (ACL) for that Vault object.
After members are assigned to the ACL, any other users requiring access to that file, folder, item, or custom object must be assigned to the ACL for that Vault object.
Files, Folders, and Custom Objects–if object-based security is in effect, the security can be overridden. An override of security means that the object ACL still exists but is being overridden by a newly defined ACL. This is an Override Access Control List or an Override ACL. As long as an override ACL exists, the object ACL is ignored. If the administrator removes the Override ACL then the object ACL becomes the new security.
Items–override security replaces state-based security on items.
See File, Folder, Item, and Custom Object Security for information on combined security and override security.