If you're already using Outlook with the Exchange server then you won't have to do anything differently than you do now.
However, if you're using Outlook as a stand-alone application (like Eudora), then you will need to apply for an Exchange account and forward your email from 'iastate.edu' (this will happen automatically when you apply for an Exchange account). You will also need to disable your current account setup (this won't affect any stored mail). In addition, Outlook/Exchange stores current mail on the Exchange server.
What this means is that you'll want to visit the Outlook-Exchange signup link in the right-hand column at Tech News and signup for a class (which will also activate your account setup). Although you will already be familiar with basic Outlook operations, the training will also cover things that will be brand-new with the Exchange server--central server storage for current mail, archives and backups, managing personal folders, and scheduling meetings.