.ADM File Extension
File Type 1Portfolio Admin-Level Access Flag
What is an ADM file?
File created when an Extensis Portfolio Catalog (.FDB file) is open in admin mode; should be automatically deleted when the Catalog is closed, but may be deleted manually if the file is not removed after closing the Catalog.
File Type 2Administrative Template File
.ADM File Association 2
Template used by Microsoft Group Policies that describes where registry-based policy settings are stored in the registry; also defines the user interface that administrators see in the Group Policy Object Editor when creating or modifying Group Policy objects (GPOs)