A customer of mine has been using Office 365 A3 which was actually a tenant for their parent university. Now the child (my customer) wants to become separate entity by having their own Office 365 tenant.
How can they move their mailboxes and other data from the parent company?
Also, define "other data", Office 365 has a vast array of workloads. Splitting up e-mail is probably one of the easiest, together with OneDrive. Then it gets more "hairy" when you go to Sharepoint and others