msiexec quiet install

I have to script emClient installation (using “wpkg”) as an msiexec command without any user interaction. The usual msiexec options (/qn or /quiet) do not work as they should: A dialog to modify default apps pops up and this probably makes the scripted installation fail. :frowning:

Are there any “hidden” options or variables I could pass to the setup.msi to get a *real* quiet installation?

BTW, is there a way to pass license information unattendedly?

Best would be to ask eM Client Inc. as this is a bit more technical than can be answered on this user supported forum.

But as far as I know, neither are possible.