Microsoft Office Tutorials and References
In Depth Information
7. Choose to either manually or automatically start the migration and provide email
addresses that a report should be sent to after the migration is complete, as shown in
Figure 12-10, and then click new.
Figure 12-10 Start migration and email address of administrators.
A staged migration is initiated through the EAC, the ECP, or through Windows PowerShell.
It is similar to a cutover migration except that you have the ability to identify a subset of
mailboxes to migrate through a .csv file. Staged migration is the appropriate migration
method if directory synchronization is already implemented.
Before we examine how to set up a staged migration, it is useful for you to know what
happens during a staged migration. When you initiate a staged migration, the following
● The migration service checks that directory synchronization is configured, prompts
for the .csv file, and checks that each entry in the .csv file is a mail-enabled user
(MEU) in Office 365.
● The service then converts the MEUs into mailboxes and populates the TargetAddress
property of the on-premises mailbox with the email address of the cloud mailbox.
● After the TargetAddress property has been updated for all mailboxes, you will receive
an email with a list of mailboxes that have been successfully created and converted.
Mailbox contents are not migrated yet, but the users can start using the mailbox
without any MX record changes. This is because if emails arrive at the on-premises
mailbox, they will be redirected to Exchange Online because of the TargetAddress