Duplicate Contacts In Touch

[brklyn]

If you have it setup to sync with outlook you can select multiple contacts to delete on your computer, then active sync again

[denasqu]

Duplicate Remover for Outlook from Mapi labs.

Activestink does this to me a couple times a year and it's a major pain to clean it up manually.

If it's just your contacts and you don't have a lot of them, just display your contacts in desktop Outlook in a list, then go through and select the dupes and delete them.