Ever needed to export the contents of an entire mailbox (or mailboxes)? The Export-Mailbox cmdlet that is available via the Exchange 2007 PowerShell console can export each mailbox to a PST file. In addition, Import-Mailbox can be used to import the contents of a PST back into an existing Exchange 2007 mailbox.
Syntax:
Export-Mailbox –Identity <mailbox alias> –PSTFolderPath <path to PST file>
There are a number of additional parameters available to filter the contents and tweet the configuration of what exactly is exported. Using Export-Mailbox can be very time-consuming. a 200 MB mailbox can take 20 minutes or more (or did so in my tests).
A few things to remember when using Export-Mailbox:
This is a perfect alternative to what required ExMerge in the past.