I had no data on my phone today so I tried to log on to email in work on the laptop with my username and password and it wouldn't allow me to. Had to confirm with back up email. And when I clicked do it another way it threw me out twice. That's appalling. I can understand if wrong password or forgotten password but considering I had the correct username and password and it still wouldn't let me log is disgraceful. I needed to log in to get a code to do my job and I wasn't able to as a result of it. Instead you should allow the log on then send a notification saying another device has logged on