To quickly delete all duplicate contacts in Outlook, you can get it done as follows.

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1. Please go to the Contacts folder (or People folder in Outlook 2013) that has multiple duplicate contacts you want to delete.

2. Apply the utility by clicking Kutools > More > Duplicate Contacts. See screenshot:

3. In the popping up Duplicate Contacts dialog box, go to the Filter Conditions bar:

A. If you want to delete duplicate contacts with completely same names and addresses, please check the Completely Same.

B. If you want to delete duplicate contacts with part of same contents, please check the Part of same, and then:

1. To delete duplicate contacts with same name, please check the Same name;
2. To delete duplicate contacts with completely same address, please check the Same address and Completely same;
3. To delete duplicate contacts with any one of same address, please check the Same address and Any one of Same.

Note: You can check more than one of three Part of same options above when you delete duplicate contacts with part of same contents.

After you specify the filter conditions, duplicate contacts are filtered and selected immediately.

Note:

(1) The Check All button will help you select all filtered duplicate contacts.

(2) The Inverse button will help you check unselected contacts but uncheck selected ones.

(3) Or you can manually select the duplicate contacts for deleting in the Duplicate Contacts dialog box.

4. Click the Delete button in the Duplicate Contacts dialog box.

5. Then a dialog box comes out and tells you how many duplicate contacts have been deleted. Just click the OK button to exit the dialog box.

Notes:

1. This Delete Duplicate Contacts utility can delete duplicate contacts from the contact list, and just keep one.

2. If you are not in the Contacts folder, after clicking Duplicate Contacts, it will pop out a dialog to remind you the wrong folder you are locating. Please click OK, and navigate to the correct folder.