Explanation/Reference:
Explanation:
To install the application, you need to 'Sideload' it. First you need to enable the Sideload apps setting.
LOB Windows Store apps that are not signed by the Windows Store can be sideloaded or added to a PC in the enterprise through scripts at runtime on a per-user basis. They can also be provisioned in an image by the enterprise so that the app is registered to each new user profile that's created on the PC. The requirements to sideload the app per-user or in the image are the same, but the Windows PowerShell cmdlets you use to add, get, and remove the apps are different.
Before you can sideload LOB Windows Store apps that are not signed by the Windows Store, you will need to configure the PC.
References:
https://msdn.microsoft.com/en-us/library/hh454036.aspx