Ok, email can be setup using a bunch of different protocols. The difference is how directly you phones data and the data on the server interact. POP and IMAP are methods for receiving email from the server, to send they use a protocol called SMTP. With POP3, email is all downloaded to your phone and saved there, with IMAP you only download the headers (...a header is like the back cover of a book). An Exchange server can do SMTP with either POP or IMAP, but when it says configure for Exchange - it means actually connecting to the mail server and integrating contacts, calendar items, email, like the Outlook client on your Windows machine. This is obviously much more server intensive and requires special permissions to do.
POP and IMAP will require the following information to work. Your login name, your password, your server, and whether the connection is secure. To find these out you can go to your coporate webmail. The user name is what you put in the user login spot, as is the password, the server will usually be either mail followed by a dot and the second half of your email address, or the web URL for the mail server...if the web access page address starts "https" then the connection is most likely secure.
This link may help further...
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