I am a systems guy who recently migrated to O365/Azure infrastructure. I have a team that develops a .NET Windows application and am trying to figure out the best path for creating an externally shareable URL from a file generated by the app. The app is used by customers which during a process generates a PDF and need to call an API to pass the downloadable URL for that PDF. I poked around graph and the documentation is really difficult to find a clear path to accomplish this and keep running into access denied issues even when I use my global admin account. I need to stay away from any user authentication and don't really need historical record of the files persisted, just to create a URL that can be shared to the next API call.