Enable Mailbox Moves–Office 365



Enable move mailboxes for the organization relationship

Run Set-OrganizationRelationship -id "Office 365 Tenant" -MailboxMoveEnabled $True



The MailboxMoveEnabled parameter specifies that the organization relationship is used to provide the credentials for moving mailboxes to Office 365. If you don’t set this parameter you are required to provide admin credentials for the remote move.

Access the Mailbox Replication Service Proxy (MRSProxy) service config file

By default MRSProxy is disabled and must be enabled to help facilitate cross forest moves. On the Client Access Server browse to

C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\exchweb\ews\web.config

Enable the MRSProxy setting on all CAS’

Locate ‘Mailbox Replication Proxy Service configuration’ in the web.config file and enable ‘ISEnabled’ by setting to true


Written by Daniel Kenyon-Smith