http://www.vaita.com/ODIR.asp 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. Using ODIR is very easy: select a folder and click the button Remove Duplicate Items . ODIR scans the selected folder for duplicates and MOVES all duplicates found to a subfolder ODIR_duplicate items. ODIR recognizes an item as a duplicate if all of the following properties match those of another item in the same folder: Contact items: first name, last name, company name and email address Appointment items: subject, location, start date and end date Task items: subject, start date, due date and status Note items: contents of the note (Body property) and color E-mail or Post items: - received emails: the internet message ID (this is a unique ...