In Quest KACE and maybe in other application-distribution systems also make sure you are including the .exe file AND its parameter in the installation parameter field.
Not: /silent
But: Firefox Setup 60.5.2esr.exe /silent
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In KACE also make sure you write the full command including the exe file AND its parameter in the installation parameter field.
Not: /silent
But: Firefox Setup 60.5.2esr.exe /silent - SGV AG 5 years ago