First open Outlook.  Next Select "Tools"->"E-Mail Accounts..."




Next Under E-mail select the option Add a new e-mail account then press "Next >".




On the next page select the option IMAP.  After selecting this press "Next >".




On the next page Under User Information fill in the "Your Name" and "E-Mail Address Field" (Your e-mail would be your username@yourdomainname.com or username@yourdomainname.net or username@yourdomainname.org).  Next under Server Information fill in "Incoming mail server (IMAP):" "Outgoing mail server (IMAP):" and  using mail.yourdomainname.com or mail.yourdomainname.net or mail.yourdomainname.org.  Next under Logon Information fill in "User Name:" with your username and "Password:" with your password.  The information for both of these fields is provided by your companies mail server administrator.
NOTE: Your information will be different than the information below!




Next click on "More Settings...".  After click on more settings click on the tab "Outgoing Server".  Then check the box "My outgoing server (SMTP) requires authentication".  Press "OK" then press "Next >".




You have just finished setting up your outlook to retrive your mail.  Press "Finish".




On the left hand hide select under "All Mail Folders" click on mail.yourdomainname.com or mail.yourdomainname.net or mail.yourdomainname.org. Press the + sign to show all folders.  Then click on the folder called Inbox.




Now select from the top navigation bar "Tools"->"IMAP Folders...".  Uncheck the box "When displaying hierarchy in Outlook, show on;ly subscribed folders.".  Press "OK".




Now Outlook is correctly configured to send & recieve mail along with displaying all of your mail folders!