I work for a small university (500ish students). 3 years ago we switched from in-house Exchange to O365 for Education, which has been a great way to save money and provide excellent services to students which we wouldn't have the resources for otherwise.
We are now at a point where students who have been using O365 for the last three years are graduating and wondering what will happen with their emails and files on OneDrive. They often have another MS account and would like to migrate all of their emails/data there. We generally keep accounts active for one year after graduation. We don't have a system in place to help with this migration, and I'm wondering if there is something out there to assist students with this (Microsoft or 3rd party)? If you're at an institution that deals with this, what is your process?