An important part of preparing to deploy Office 365 for education services is making sure that all the system requirements are met for the machines used by administrators and users to connect. There are minimum levels supported and recommended for client operating systems (PC or Mac), browser versions (IE, Firefox, Safari or Chrome) and Microsoft Office versions (2007, 2010).
Office Desktop Apps
If you’re planning to deploy the optional directory sync and identity federation capabilities, your Active Directory must be a single forest on a recommended minimum of Windows Server 2008 (support for Windows Server 2003 ends January 1, 2013).
Keep up-to-date with recent Service Updates to Office 365 by reviewing the Service Updates wiki page in the Office 365 Community site: