Our app is an in house app which is only installed on selected customer devices. We don't have it available in the app store (and don't want to).
Our customers used to install our ad hoc ipa over iTunes. But it seems to be impossible on iTunes 12 on Windows. It works on macOS though. Dragging over the ipa to the device in iTunes works (device is outlined blue and app is installed on drop). On Windows it does nothing. Same version of iTunes (220.127.116.11) on both sides.
Any ideas how Windows users can get the app on their phones? Some of our customers don't run Macs.