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We will be moving mailboxs from one exchange server to another one. Thier Mailboxs are quite large. We are discussing whether doing this during the day or at night. <br />
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My question is is it possible that users can lose emails sent to them during their mailbox move? If we we would move them at night.
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We will be moving mailboxs from one exchange server to another one. Thier Mailboxs are quite large. We are discussing whether doing this during the day or at night. 

My question is is it possible that users can lose emails sent to them during their mailbox move? If we we would move them at night.

Exchange Mail box move.

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.