How to set up a second email account on an iPhone 4?

I already have an email account set up on my phone but I really need to add my school account, so I have gone on add account etc etc and I'm now on a page that says Email;Server;Domain;Username;Password;De… What is a server and a domain? How do I know what my specific one is? If its relevant, the school's email is on Microsoft Outlook.

Iphone is here
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