If you want to export or backup a user mailbox to a PST file to import to Microsoft Outlook, you need a machine running Microsoft Operating System 32 bit version with Microsoft Outlook installed or MAPI component, on the same domain of the Exchange Server.
On this machine, you need to install Microsoft Exchange Management Server (you can find this on the Microsoft Exchange CD installation wizard) or download (2007 version) from: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=6be38633-7248-4532-929b-76e9c677e802.
First you need to grant yourself permission’s on this database:
Get-mailbox -database ‘SERVERNAME.DOMAIN.LOCALdatabaseName’ | Add-MailboxPermission -User “danielcosta” -AccessRights FullAccess
After this, open Exchange PowerShell and run this command (change what you need) to backup a single mailbox:
Export-Mailbox -id username -PSTFolderPath E:folder
If you want to backup all users in a Exchange Database to a folder you can run this:
Get-mailbox -database ‘SERVERNAME.DOMAIN.LOCALdatabaseName’ | Export-Mailbox -PSTFolderPath c:folder