I can't find an exmerge.exe option on Exchange 2007 Sp1, I have found a powershell command called Export-Mailbox -Identity, but this doesn't work on the Exchange Server or a local Windows XP workstation with Office 2007..

Exmerge doens't exist anymore for Exchange 2007 the only way is by using the command you tried. Please note that you need to have the following: ExchangeServer Administrators role and local Administrators group for the source server Full access to the source mailboxes If you don't have these it won't work. Maybe the following KB can help you: http://technet.microsoft.com/en-us/library/bb266964.aspx