I'm currently in this scenario where I have been sent a one-off email containing a batch file no larger than 100kb. Clicking on the file does nothing, and there is no download href to view. I know it's safe since I trust the sender on that and even then I know to read the code before executing the file.
All the solutions I have found online so far are to use regedit to change a registry key (if you have the application) or to convince the sender the change/remove the file extension or upload it somewhere else. But you see, I cannot download the microsoft mail application and I must use their outlook.live.com website, and that email with the attachment I received will be the only one of its kind.
What do I do?