Move mailbox from Exchange 2010 On Premise to Office 365

Screenshots below outlines the process of moving a mailbox from on-premise Exchange 2010 enviroment to Office 365.

Assumptions:

• Primary SMTP Domain: CONTOSO.COM
• Federated Service Domain: SERVICE.CONTOSO.COM
• External URL for Co-exist Exchange 2010 server: OWA.CONTOSO.COM

Prerequisites:

• Rich Co-exist has already been established between On-prem Exchange and Office 365 (refer to Exchange Hybrid Deployment Configuration Tips: Sharing Free/Busy Information and Exchange Server Deployment Assistant on how to) 
• Mailbox Replication Proxy Service has been enabled on the co-exist Exchange 2010 server.

Steps:

1. From EMC On-Premise, go to Recipient Configuration -> Mailbox, highlight the mailbox you are going to move, click New Remote Move Request from the Action pane

2. Choose Office 365 as the target forest; specify external URL of your co-exist Exchange 2010 server with an account that has adequate permission to the on-premise Exchange environment

3. Enter the federated service domain as the Target Delivery Domain

4. After the remote move request has been generated successfully, go to EMC Cloud -> Recipient Configuration- > Move Request to verify the status of the move request. You can also run Get-MoveRequest | Get-MoveRequestStatistics from a remote powershell session that connects to Office 365 to verify the status.

5. The move request has completed successfully.

6.  As a result, user4 now is showing as the Contact in on-premise Exchange

    And a mailbox in Office 365.