Use this type of migration if: You have Exchange 2013, want to maintain both on-premises and online mailboxes (even if only ...

Use this type of migration if: You have Exchange 2013, want to maintain both on-premises and online mailboxes (even if only temporarily) for your organization, want to gradually migrate users and email to Office 365, and want to manage your Office 365 users from on-premises. Requires setting up directory synchronization from on-premises to Office 365.