ADMX files are a .xml representation of the Windows Registry, copying these files to the 'PolicyDefinition' folder of the local client expands GPO Editor for additional products and services. In a Domain admx files are copied to the 'Central Store', with a standalone its 'C:\Windows\PolicyDefinitions' folder.
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In this example, MS Edge and Google's Chrome admx files will be copied to the local client during deployment from MDT.
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Download and unzip the polices files for Edge and Chrome.
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https://www.microsoft.com/en-us/edge/business/download
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https://cloud.google.com/chrome-enterprise/browser/download
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Not all the files are required, select en-US and any additional language folders for both adml and admx. Create a folder for each application, a sub-folder for admx and adml, and move the relevant files to the corresponding folder. Finally copy the entire content to the 'Scripts\Custom\' folder under the MDT Deployment Share.
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<#
.Synopsis
Copy ADMX files to local client store
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.Description
.Version
#>
#Source folder for content
$path = Split-Path -Parent $myInvocation.MyCommand.path
#admx and adml destination folder
$admX = "C:\Windows\PolicyDefinitions"
$admL = "C:\Windows\PolicyDefinitions\en-us"
#Source plus product specific admx and adml files
#Edge
$edgeL = $path + "\Edge\adml\*"
$edgeX = $path + "\Edge\admx\*"
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#Chrome
$chromeL = $path + "\Chrome\adml\*"
$chromeX = $path + "\Chrome\admx\*"
#Copies polices to Policy Definition folder
Copy-item $edgeX $admX -Exclude *.ps1 -Force -recurse -Verbose -ErrorAction SilentlyContinue
Copy-item $edgeL $admL -Exclude *.ps1 -Force -recurse -Verbose -ErrorAction SilentlyContinue
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Copy-item $chromeX $admX -Exclude *.ps1 -Force -recurse -Verbose -ErrorAction SilentlyContinue
Copy-item $chromeL $admL -Exclude *.ps1 -Force -recurse -Verbose -ErrorAction SilentlyContinue
Save the script to the root of the ADMX folder
Update the MDT client Task Sequence and add a PowerShell script step
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