The first thing to keep in mind is that while Live@edu and Office 365 for Education are conceptually designed to serve the same type of customer, they have several different components.

Live@edu, which is free, includes Outlook Live for email, Office Web Apps, Windows Live Messenger for instant messaging and Windows Live SkyDrive for 25GB of online data storage.

Office 365 for Education comes in a variety of packages. The free, standard one, called A2, includes Exchange Online, Lync Online, SharePoint Online and Office Web Apps.

The Office 365 Exchange Online component is basically the same as Live@edu's Outlook Live, so transferring from one to the other should be fairly straightforward.

For that reason, it seems like the most automated migration option would be for Live@edu customers to move simply to what Microsoft calls Exchange Online Plan 1, an option limited to email and calendar.