What happens to my existing mail, contacts, and calendar data when I move to G Suite?

When switching to G Suite from another program or web service, you and your users can bring your existing mail, contacts, and calendar data with you. You have a variety of options for migrating data into G Suite, depending on the size of your organization and the system you’re migrating from. Tools are available for migration from Microsoft Exchange, Lotus Notes, IMAP servers and other Google accounts.