MSIX Pakage for Testing then Production

Hi SteveDeleon 

The recommended approach is to use different package names for prod and non-prod. If you're using the App Packaging Project in VS you can add two instances of the Packaging project to your solution, one for prod and one for non-prod. Just make sure to name them differently in the Packaging tab that shows up when you double click the package.appxmanifest e.g. 

Both of your Packaging Projects can reference the same Application and you only have to build this application once.

If you'd like an even more customisable solution to create different packages and deploy to different users from the same build have a look at this talk and this sample that walk you through how to setup an MSIX packaging & deployment CI/CD Pipeline using Azure DevOps.

Hope this helps!

Tanaka