Migrate mailbox from exchange 2016 to exchange online with time filter

Hi,@Leo Lee

Thanks for posting your question in the Microsoft Q&A forum.

I'll answer your questions in turn:

**1.**Is it possible to choose from which time period mailbox items are to be migrated to o365 by EAC or PowerShell? Let's say only last two years items to be migrate?

You can indeed filter which items to migrate based on certain criteria such as date ranges. This can be done using PowerShell when setting up the migration batch.

New-MigrationBatch -SourceEndpoint $endpoint -Name "MigrationBatchName" -CSVData $csv -ContentFilter {(Received -lt 'mm/dd/yyyy') -and (Received -gt 'mm/dd/yyyy')}

Replace mm/dd/yyyy with the appropriate dates to define your two-year range.

**2.**If possible, what is the status of the remain items in on Prem server? Mailbox will moved or remain in Exchange server? Can user access the old mailbox?

The remaining items in the on-premises server will stay there unless you choose to delete them. The mailbox itself will be converted into a mail-enabled user if you're performing a remote move migration, which means the user will appear to be a mailbox user in the on-premises Exchange, but their mailbox will actually be in Exchange Online. Users can access their old mailboxes if you set up an archive or if you don't delete the mailboxes from the on-premises server.

**3.**Once mailbox moved to exchange online, can I keep archive mailbox in on-premises Exchange Server ?

This one can't be realized.

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