Using classic Outlook for Windows in business environments
Oh, and the online support - if you get through, also does not mention anything and simply dumps you with a security form to fill in - asking such memorable questions as "how much was the tax on your first skype call ever? and who was the last person you talked to on skype - needless to say, you get refused at every turn!
M/soft have also some tie-in with google - why I don't know, but when you are trying to recover an account it's kind of putting you off to be asked for your google account instead..