Microsoft's Outlook does a good job of retaining all kinds of useful information, but its power and complexity make it entirely too easy to end up with multiple entries for e-mail or addresses. Wisco's NoMoreDupes for Outlook add-on searches out and deletes duplicate entries throughout Outlook. It can help you keep your e-mail addresses and saved messages neat and orderly, but it does much more. It finds duplicate entries in your Contacts as well as duplicate e-mails, but it also searches through your Outlook Appointments, Notes, Tasks, and Journal entries, clearly identifying duplicates, some of which you may have been afraid to delete. With NoMoreDupes, you can choose which files to keep or delete and be sure that the dupes are zapped.
NoMoreDupes' interface presents duplicates in a color-coordinated tree file that makes it extremely easy to see which files are duplicates of which and where each resides. It will search across folders to find redundant entries. It has some customizable options, such as configuring how it searches for duplicate and displays duplicates. You can click each entry to open it automatically to verify duplicate entries before you delete them. Simply select the entries you want to delete, and NoMoreDupes wipes them all at once.
NoMoreDupes for Outlook downloads and installs cleanly but leaves folders behind when it's uninstalled. It's free to try for two weeks and 30 bucks to buy, which is not bad for a home businessperson or others who rely on Outlook to manage their far-flung contacts.