Less MSI or lessmsi is a free portable tool that lets you view & extract the contents of an MSI installer package from command-line as well as GUI.

I have a .msi package represnting the Citrix ICA client verison 9 for 32-bit Windows. I want to customize this package so that when users install it they are already pointed to our Citrix server ...

Microsoft and Chronicle's VirusTotal have teamed up to better detect signed MSI files that have been modified to include malicious Java archives.