Hi brammer1,
Thanks for coming back to us on this one.
To access the part that 用心棒 has linked you to, you will need to be logged in to webmail. The routing again to use is clicking on the ⚙ icon in the top right hand corner > Settings > Security.
It's also worth checking your browser settings as if you have the cookies and cache to clear on exit then this will reset things each time too.
Keep us posted on how things go.
Many thanks,