You can connect to Exchange using Entourage 2008 Web Services Edition (WSE).
OIT recommends you upgrade to Outlook 2011. It provides even greater functionality. Outlook 2011 is part of the Office 2011 productivity sutie and available to you at no cost by the Microsoft software campus EES agreement.
Starting February 2015, campus units and departments began being migrated to Exchange Online, on an individual basis. If your department has been migrated, please visit the Exchange Online service area for more information.