only with a 3rd party program.
See
http://www.slipstick.com/addins/mail_duplicates.asp
--
Diane Poremsky [MVP - Outlook]
Outlook Tips:
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Let's Really Fix Outlook 2010
http://forums.slipstick.com/forumdisplay.php?f=34
"JonBB" <(E-Mail Removed)> wrote in message
news:CBE90DAA-DF8E-4E62-8E3B-(E-Mail Removed)...
> After several synchonisations and recoveries I have duplictate emails
> throughout my various folders. I probably have several gigabytes of space
> being used unnecessarily.
> Is there an easy way to thin them out?
>
>