Which source email system are you migrating from?
Applies to: Office 365
This content has moved to https://support.office.com/, please see What you need to know about migrating your IMAP mailboxes to Office 365 instead.
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Applies to: Office 365
This content has moved to https://support.office.com/, please see What you need to know about migrating your IMAP mailboxes to Office 365 instead.