Add a New Non-EXE Application
You can add a non-exe application to an MSIX package point to one the following file formats: .bat, .cmd, .txt, .html, and .docx.
To create a non-exe application:
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Navigate to the Applications view under the Application Properties menu.
The Applications page opens.
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Right-click on the Applications node, and then select Add Application (non-exe) from the context menu.

The Non-Exe Application Properties Configuration view opens.
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Enter the details in the respective fields and then click the Update button. For more information on Applications properties, see Applications View.

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Click Save or Save As in the ribbon for the change to take effect.