In three earlier blog posts I explained how to implement directory synchronization and how to create an Exchange hybrid configuration:
- Implementing Directory Synchronization – https://jaapwesselius.com/2015/05/13/implementing-directory-synchronization/
- Exchange 2013 Hybrid Prerequisites (Part I) – https://jaapwesselius.com/2015/07/02/exchange-2013-hybrid-prerequisites-part-i/
- Exchange Hybrid Configuration Wizard (Part II) – https://jaapwesselius.com/2015/07/03/exchange-2013-hybrid-configuration-wizard-part-ii/
These steps will create a hybrid configuration between your on-premises Exchange 2013 environment an Exchange Online, but to move mailboxes from Exchange on-premises to Exchange online (or vice versa) you need to create an endpoint. This an on-premises Exchange 2013 server (but it can be more) where the Mailbox Replication Service (MRS) is running, used to move mailbox data from one server to another. The process is similar to an on-premises mailbox move where the MRS is responsible.
Create a migration endpoint
To create an endpoint you have to go to the Exchange Admin Center in Office 365 and login as an Office 365 tenant administrator. You can get there via the Microsoft Online Portal, select Admin | Exchange, or navigate directory to the Exchange Admin Center, and login as an Office 365 tenant administrator.
In the Exchange Admin Center dashboard, under Recipients select migration. At this point an empty screen will be shown: