Typically, Windows Store apps are available only through the Windows® Store. You can submit LOB Windows Store apps to the Windows Store and make them available outside of your enterprise. However, you can also develop Windows Store apps for use only within your enterprise and add them to Windows devices you manage through a process we call sideloading. Sideloaded apps do not have to be certified by or installed through the Windows Store.
Apps that aren't signed by Windows Store can only be installed on sideloading-enabled devices. You can enable sideloading on Windows® 8 Enterprise or Windows Server® 2012 by joining the computer to a domain. To enable sideloading on a Windows 8 Enterprise computer that is not domain-joined or on any Windows® 8 Pro computer, you must use a sideloading product activation key. To enable sideloading on a Windows® RT device, you must use a sideolading product activation key. For more information about sideloading product activation keys, see Microsoft Volume Licensing.
LOB Windows Store apps can be sideloaded onto 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. This topic provides steps for both methods.
You cannot sideload an app that has been downloaded from the Windows Store. To install Windows Store apps that are not part of your business line, you must use the Windows Store. For more information about the Windows Store, see Managing Client Access to the Windows Store.