Outlook Duplicate Items Remover (ODIR)

“Free, Fast and easy tool for removing duplicate items from Outlook folders

With ODIR it’s a snap to clean your Outlook folders by removing all duplicates. ODIR removes duplicates from Contacts; Calendar; Tasks; Notes and Email folders."

• http://www.vaita.com/ODIR.asp

Microsoft’s perspective:

• How to remove duplicate imported items in Outlook (kb299349)
• http://support.microsoft.com/kb/299349