Migrate Office 365 mailbox to a different on-premises domain

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Paul Abke

New Member
Outlook version
Outlook 2013 32 bit
Email Account
Office 365 Exchange
I am wondering if there is a tool or best practice on moving about 80 Office 365 mailboxes to an on-premises domain that is different than the Office 365 domain? Think of a merger scenario of two companies and the Office 365 mailboxes and calendars need to be moved to the on-premises Exchange server of the other company. On-prem is Exchange 2013.

I see that MessageOps has a tool to export the Office 365 mailboxes to .pst files. I am wondering how calendar meetings work with the new domain? I am thinking they become static and if changes need to be made the meeting request must be sent out with the new domain account?

Thank you for your feedback.
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