Duplicates Remover for Outlook 

Delete duplicate contacts, notes, tasks, etc. in Microsoft Outlook; searching across folders. A duplicate found can be marked, copied or moved to any folder. Works as an add-in for Microsoft Outlook 2000-2003. Free trial.
msoutlook outlook addin addon plugin duplicated contacts duplicated notes duplicated tasks duplicated journal duplicated calendar delete remove mark eliminate

Duplicate Email Remover 

Delete duplicate emails and posts in Outlook and Microsoft Exchange Server folders; search across your folders. A duplicate found can also be marked, copied or moved to any other folder. Works as an add-in for Microsoft Outlook 2000-2003. Free trial.
msoutlook outlook addin addon plugin duplicated mail delete remove mark eliminate inbox cleaner outlook software