In a hybrid deployment, you have mailboxes in both your on-premises and cloud-based organizations. As part of on-going recipient management, you’ll often have a need to move mailboxes between the two organizations.This could be because a user is moving departments or because a manager is being assigned a new delegate, and so on. While moving mailboxes from the on-premises organization to the cloud-based organization uses the New Remote Move Request wizard, moving mailboxes from the cloud-based organization to the on-premises organization requires a few additional configuration steps.
Moving Cloud-Based Mailboxes to the On-Premises Organization
Use these steps to move mailboxes from the cloud-based organization to your on-premises organization. The steps necessary to move a mailbox back to the on-premises organization depend on how the mailbox was originally added to the cloud-based organization:
- Created in the cloud-based organization If the mailbox was created in the cloud-based organization, you need to perform some steps before you can move the mailbox back to the on-premises organization. See the Configure on-premises remote mailbox section for more information.
- Moved to the cloud-based organization If the mailbox was moved to the cloud-based organization, you don’t need to perform any additional steps before you move the mailbox. You can move the mailbox back to the on-premises organization by using the steps in the Move mailbox to on-premises organization section.
If you want to know how to move a mailbox to the cloud-based organization, see the steps for the version of Exchange installed in your on-premises organization:
Note These steps assume that you’ve configured a hybrid organization using the Exchange Server Deployment Assistant (ExDeploy). For more information about ExDeploy and hybrid deployments, see Exchange Server Deployment Assistant and click on Coexistence. In the current version of the deployment assistant, a hybrid deployment is referred to as a coexistence deployment.
Configure on-premises remote mailbox
If the cloud mailbox that you want to move to the on-premises organization was originally created in the cloud-based organization, you’ll need to configure the ExchangeGUID property on the associated on-premises remote mailbox. You’ll need to do this because when the mailbox is created in the cloud-based organization, the value stored in the ExchangeGUID property on the cloud-based mailbox isn’t synchronized back to the associated on-premises remote mailbox. To move a mailbox, the value stored in the ExchangeGUID property must be the same on the cloud-based mailbox and on the associated on-premises remote mailbox.
Author: David Strome, Senior Technical Writer – Exchange
Microsoft Office 365 Community.