It must be installed on the machine, but it is set as a user installation. about microsoft-win32-content-prep-tool HOT 4 OPEN

+1. I have a "user-context" MSI that installs to Program Files... Works fine for users with local admin, but that's what we're trying to avoid by using Intune.

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Have you tried setting permissions to the folder to allow users access to that directory?

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So sounds like there's a need for an "override detected installation method" option and you each have a slightly different use-case.
Additionally, @pl4nty's issue sounds more like the MSI is not written for per-user installations and may need some customization to properly work. whether that be via changing permissions or some other means.

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@suprnova74 I believe overriding the detected install method was what I did, via detection.xml. Modifying the MSI itself would have been too time-consuming if an update was required.

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