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If office 365 has an IMAP service then you can use imapsync &nbsp;( <a href="http://ks.lamiral.info/imapsync/" rel="ugc">http://ks.lamiral.info/imapsync/</a>&nbsp;)
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If office 365 has an IMAP service then you can use imapsync  ( http://ks.lamiral.info/imapsync/ [http://ks.lamiral.info/imapsync/] )

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I'm planning on cutting over from IMAP emaIL to O365 tomorrow night - 30 users approx. &nbsp;I ran a data migration from the IMAP server last night which went fine. &nbsp;I was wondering though, if I could re-migrate tomorrow night in order to grab the new messages that would have been received since the initial copy yesterday. &nbsp;Will it duplicate existing messages, overwrote them, or is this even possible to do? &nbsp;Any better suggestions certainly appreciated as well.<br />
<br />
Thanks<br />
Tom
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I'm planning on cutting over from IMAP emaIL to O365 tomorrow night - 30 users approx.  I ran a data migration from the IMAP server last night which went fine.  I was wondering though, if I could re-migrate tomorrow night in order to grab the new messages that would have been received since the initial copy yesterday.  Will it duplicate existing messages, overwrote them, or is this even possible to do?  Any better suggestions certainly appreciated as well.

Thanks
Tom

O365 IMAP data copy

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.