How to uninstall with msiexec using product id guid without .msi file present

Question

I\'m trying to automate the uninstallation of packages created using WiX for the purposes of changing the installed software stack & configuration without reprovisioning

Answer 1

Thanks all for the help - turns out it was a WiX issue.

When the Product ID GUID was left explicit & hardcoded as in the question, the resulting .msi had no ProductCode property but a Product ID property instead when inspected with orca.

Once I changed the GUID to '*' to auto-generate, the ProductCode showed up and all works fine with syntax confirmed by the other answers.