You can use the CLI manually to create a new MSIX package for your application.
The way that you do this is through commands with an elevated command prompt, with certain parameters that can be passed as command line arguments.

You need to have a path to the conversion template XML file that contains the package information in the settings for this conversion.
You also need to have the password for the virtual machine that is going to be used for the conversion environment. Your template file has to contain a virtual machine element and the settings.

There are various other commands and functions that you need to be aware of when it comes to using the command line in order to use MSIX manually.
Let’s take a look at some examples of commands and functions that you might need:

Great news!

MSIX Packaging Tool has arrived in the Microsoft Store.

The tool is your way to update existing win32 application packages to the new and improved MSIX format.

The MSXI Packaging Tool can help you convert application into the MSIX package format.

The Packaging tool supports msi, exe and App-V 5.x.