You could side-load the app. Please refer to the following links for more information and examples on how to do this:
Deploying enterprise apps:
https://msdn.microsoft.com/en-us/library/windows/apps/jj657971.aspx
Side Loading Deployment of Windows Store Apps in Enterprises – Step by Step:
http://blogs.msdn.com/b/mvpawardprogram/archive/2014/03/24/side-loading-deployment-of-windows-store-apps-in-enterprises-step-by-step.aspx
Try it out: sideload Windows Store apps:
https://technet.microsoft.com/en-us/windows/jj874388.aspx
Hope that helps.
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