Installing Web Browser Extensions Using Group Policy
To install web browser extensions via group policy you must install the protocol application with INSTALLWEBBROWSEREXTENSIONS="" parameter:
msiexec /i ITHitEditDocumentOpener.msi /qb MSIINSTALLPERUSER="" WEBCLIENTAUTOSTART="1" INSTALLWEBBROWSEREXTENSIONS=""
If you install the protocol application without the INSTALLWEBBROWSEREXTENSIONS="" parameter before installing web browser extensions, web browser extensions may appear as disabled.
To install web browser extensions using group policy follow the instructions below:
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Unzip the ITHitExtensionsInstall.zip file and copy the .admx files and the en-US folder to the %systemroot%\PolicyDefinitions folder on your Active Directory or RDS host.
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On the Active Directory host, open the Group Policy Management Editor.
On an individual RDS host, you can open the Local Group Policy Editor with the gpedit.msc utility.
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Go to User Configuration > Administrative Templates > Install IT Hit Browser Extensions.
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Go to every policy with the extension and enable it.
See also protocol application automated installation instructions in Protocol Application Installation on Windows article.