When you run a migration batch job with multiple
user accounts it completes for some users and fails for others. The migration
batch job has successfully migrated 3/5 of the user mailbox to Office 365, but
I still have to get the other mailboxes up to Office 365. When I tried
re-running the same migration job the same mailboxes failed again. I then tried
to create a new migration batch job for each of the failed mailboxes, however
that failed as you cannot have the same mailbox referenced in the same batch job
at the same time.
From what I could tell there is no way from inside
the GUI to remove migration users from a batch job, and if you are like me and
have successful syncs within the same job you probably don’t want to delete the
job, and if you are not at the point in which you want to “finalise” the
migration job you must somehow remove the failed users from this batch job.
This
can only be done using the Exchange Online PowerShell cmdlets. Firstly, create
a session to Office 365 and then Exchange Online. From there you can run the
following command to view and remove migration users.
|
Get-MigrationUser
–Identity user@domain.com | Remove-MigrationUser
|
When
you return to the GUI the users will have been removed from the migration batch
and you will be free to create new migration batches to get the mailboxes
ingested into Office 365.
It
should be noted that you cannot actually complete (or finalise) a migration
batch job if there are failed mailboxes referenced in the job. The option does
not appear inside the GUI until all mailboxes in that job are “synced”
successfully.