ADMX are Administrative Templates for Group Policy Objects, that Programs can add for management in an AD-Domain.

The wiki page Neue Administrative Templates hinzufügen explains how they can be used.

They are often accompanied by ADML Files, which provide Language Packs for those Administrative Templates.

Wenn als MSI ausgeliefert können sie mit folgendem Befehl entpackt werden:

msiexec /a drive:\filepath\to\MSI\file /qb TARGETDIR=drive:\filepath\to\target\folder

Win 11 21H2: https://www.microsoft.com/en-us/download/details.aspx?id=103507