Chapter 16
Migrating mailboxes to Exchange Online
After the Hybrid Configuration Wizard has completed, your environment should be configured to enable you to move mailboxes between on-premises and cloud environments.
Mailbox migrations can be performed using either the Exchange admin center or Windows PowerShell. When a mailbox migration is run, the Mailbox Replication Service Proxy (MRSProxy) queues and manages the requests.
For a mailbox to be migrated to Exchange Online, the following criteria must be met:
The mailbox must be synchronized to Exchange Online as a mail-enabled user.
The synchronized mail-enabled user must have a value for
ExchangeGuidthat matches the value ...
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