I seem to have one build that worked and uploaded to the Windows Store, and it ends in .appxupload. The problem is, I cannot seem to recreate the build. Everything I generate is a .appx or .appxbundle file which will not upload to the Windows Store. I get this error even though I am building under the Store menu option: "Package acceptance validation error: This package wasn't built for submission to the Store. Make sure you're uploading a Release build with the .NET Native tool chain enabled. http://go.microsoft.com/fwlink/?LinkId=797528" Does anyone know the exact settings I should be using? I am using the following: VS: Release VS: x86 Unity: Unity C# Projects Unity: D3D Unity: .Net with .Net Subset Code does deploy to the HoloLens without issue. I am running Unity 2017.1.0f3 with VS Pro 2017.15.0 and trying to upload a HoloLens package.