SetAcl

SetAcl is a term used for tools and commands that modify access control lists (ACLs) on securable objects in Windows. These objects can include files and folders, registry keys, services, printers, and other resources that support permissions and auditing. SetAcl implementations are used by administrators to adjust who can access an object, what actions they can perform, and under what conditions those permissions apply.

The name SetAcl often refers to two broad families of tools. One is the Windows command-line utility SetACL (a standalone program used to view, assign, or modify ACL entries across various object types). The other is the built-in PowerShell cmdlet Set-Acl, which provides similar functionality within the PowerShell scripting environment. While they share the same underlying purpose, they differ in syntax, supported object types, and administrative workflows.

Core capabilities commonly supported include viewing current ACLs, adding or removing permissions for specific users or groups, changing ownership, and adjusting auditing settings. Many implementations also support inheritance control and the ability to apply changes recursively to child objects, as well as exporting and importing ACL configurations for backup or migration purposes.

Common use cases involve automating permission changes across large collections of files or registry keys, remediating security issues, migrating permissions during system upgrades or deployments, and enforcing consistent security policies in enterprise environments. Users should exercise caution, as incorrect ACL changes can inadvertently grant or deny access, potentially locking out legitimate users or compromising security. Always test changes in a safe environment and maintain backups.

See also Set-Acl, SetACL, ACL, DACL, SACL.