.admx — Administrative Template XML
Microsoft · 2007
.admx files are XML-based templates used by Windows Group Policy to define and manage system and application settings.
Key Features
- XML-based structure for policy definitions.
- Separates policy schema from language-specific presentation.
- Centralizes configuration management for Windows environments.
- Enables granular control over OS and application settings.
Best For
- Centralized administration of Windows networks.
- Enforcing consistent security configurations.
- Deploying and managing application settings at scale.
- Controlling user experience and system behavior.
Less Ideal For
- Storing user data or application files.
- Defining policies for non-Windows operating systems.
- Directly modifying system configurations on individual machines.
- End-user configuration of personal settings.
Common Use Cases
- Defining and enforcing security policies on domain-joined computers.
- Controlling user interface elements and application behavior.
- Standardizing software configurations across an organization.
- Managing Windows updates and feature deployments.
How to Open It
- These files are not meant to be opened directly by end-users but are processed by the Group Policy Editor (gpedit.msc) or Group Policy Management Console (GPMC) on Windows servers and workstations.
- To view or modify policies defined by .admx files, you typically need administrative privileges and access to the Central Store on a domain controller or the local policy editor.
- System administrators install .admx files into the PolicyDefinitions folder (or Central Store) to make the policies available for configuration.
What is a .admx file?
Administrative Template XML (.admx) files are used by Microsoft Windows to define the user interface for Group Policy settings. They essentially act as a structured way to present configuration options to system administrators, allowing them to manage and enforce various aspects of the operating system and applications across a network. These files separate policy definitions from language-specific elements, with .adml files handling the latter, making them a flexible system for centralized management. They are a core component of modern Windows domain environments for controlling user and computer settings.
Programs That Open .admx Files
| Platform | Program | ||
|---|---|---|---|
| Windows | Group Policy Management Console (GPMC) | Free | Official |
| Local Group Policy Editor (gpedit.msc) | Free | Official |
Common Problems with .admx Files
Frequently Asked Questions
ADMX files contain the actual policy definitions in an XML format, while ADML files contain the language-specific display text, tooltips, and UI elements for those policies. Both are required for Group Policy settings to be displayed and managed correctly.
Yes, ADMX files are plain text XML files and can be edited with any text editor or XML editor. However, it's crucial to understand the schema and maintain valid XML structure to avoid breaking Group Policy functionality. It's generally recommended to use specialized tools or experienced personnel for editing.
On individual Windows client machines, they are stored in `C:\Windows\PolicyDefinitions`. In a domain environment, they are typically copied to the Central Store located on a domain controller, which is a shared folder accessible to all management tools.
Technical Details
.admx files are XML documents that contain the definitions for Group Policy settings. They specify the categories, display names, and properties of settings that administrators can configure. These files are paired with .adml (Administrative Template language) files, which contain the localized strings and user interface elements for these settings, allowing for a clean separation of policy definition and presentation.