You can connect to Microsoft Office 365 using Windows Live Mail 2009. Windows Live Mail 2009 provides both POP3 and IMAP4 capability. However, you won't get all the functionality available with full featured E-mail clients, such as Microsoft Outlook.
Help with Windows Live Mail 2009 is available at the ITS Help Desk and the Open Access Labs.
Please note, all of the links below point to instructions on Microsoft's web site. As updates are made to Office 365, these instructions will also be modified to show the most up to date information. Please note that Windows Live Mail 2009 is an older client. If you experience problems connecting your system to Office 365 using Windows Live Mail 2009 you may want to consider upgrading to a newer version.
If you have problems connecting with Windows Live Mail 2009, additional information is available at: What else do I need to know?