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We are developing a printer driver with an UWP device app and want to test the app within our organization. To do this we sign the driver, the Companion app and the devicemetadata-ms file with a self-signed certificate and deploy them to a new machine. However when we add the printer on a computer with Test mode disabled the companion app is not detected. The printer does not show that there is a companion app available. We have verified that the metadata file is correct, for example, the icon for the device is loaded without any problems. The application is immediately recognized once Test mode is turned on.
Are there any additional steps we are overlooking to get this working? Do we need to upload the Companion app to the Microsoft Store for it to work with a device without enabling test mode?
