if you install the Exchange Management tools on your local client, so long as you are in the same domain as your exchange servers...
you should be able to open the Exchange Management Shell (EMS) and run a simple command
Get-mailbox -resultsize unlimited | select name, emailaddresses |export-csv C:\exchangedump.csv
Link for download of EMT:
http://www.microsoft.com/downloads/...laylang=en Link for instructions on how to install tools:
http://support.microsoft.com/kb/555841