Why does outlook keep signing me out. It says for my security it will automaticly sign me out after I have not used it in 24 hours. I sign on and after 10 minutes it signs my off.

I sign into Outlook. com and after about 10 minutes it will sign me off. It says for security it will sign out after 24 hours of being idle.

I have only been on 10 minutes. What is the problem?

Question about Outlook Express