Outlook does not have an option to log out of all signed in devices

I just discovered this because I got an email from Microsoft about suspicious log in activity. When I opened the list of sign in attempts I found *one unsucessful log in attempt* ***EVERY TWO TO THREE DAYS*** for the past however many months. I have never checked this list before, obviously.
After several hours of freaking out and chatting with Microsoft, I realized the log in attempts were made with an ancient Hotmail-adress that's connected to my primary account as …

devices email list log microsoft outlook privacy sign