How to Merge Duplicate Contacts in Outlook 2010, 2013, 2016, 2019

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Duplicate contacts in Outlook are the most common issue with Outlook users. No need to worry because, in this article, we will explain how to merge duplicate contacts in Outlook numerous techniques to combine Outlook contacts. Also, we provide you with the best solution to overcome this issue. So, read this article till the end.


Whether you have duplicate emails or duplicate contacts in your Outlook application, it will create trouble for you. It will occupy unnecessary space and sometimes leads to sending emails to the wrong recipient. Thus, it becomes obvious to learn how you can eliminate all those duplicate contacts.

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MS Outlook is an advanced email client which helps you to manage multiple email clients on a single platform. It provides you with numerous features like Contacts, Calendars, Journals, Notes, etc. While saving contact to Outlook, you may accidentally end up creating duplicate contacts.

Before learning how to merge duplicate contacts in Outlook 2010, let us check what causes duplicate contacts.

Also Read: How to Export Contacts from Outlook OST to PST manually?

What Causes Duplicate Contacts in Outlook?

There are several reasons for occurring duplicate emails in your Outlook. Some of the most prominent causes are discussed below.

  • When you drag a message to the contact folder, it leads to the creation of its corresponding contact. So, when you receive multiple emails from the same email account, this situation occurs.
  • Also, if a person mails you from different email accounts and you save both the email addresses of the same person, it makes duplicate contacts.
  • Maintaining multiple address books in the same Outlook profile is another big reason for contact duplicates.

All the above-mentioned reasons cause duplicates in Outlook contacts. Now, we explain different techniques to merge Outlook duplicate contacts.

How to Merge Duplicate Contacts in Outlook?

Before knowing how to merge duplicate contacts in Outlook, you have learned the root causes of contact duplicates. Now, we will discuss how you can merge outlook contacts and avoid complexity. You have to perform some simple steps in the Outlook application.

  • Open Outlook application in your system.
  • Click on the File button and select the Options tab.

click on Options tab

  • In the Outlook Options wizard, choose the People option.


  • After that, tick the check for duplicates when saving new contacts option and click on OK to save changes.

check for duplicates

  • Now, switch to the People tab located at the bottom bar.

click on people tab

  • Right-click on any available folder and select the New Folder

Note: For demonstration, we have created two different contact folders: Contact 1 and Contact 2.

  • Open Content 1 (contact folder containing all the email contacts). Select all the available Outlook contacts.

select content 1 to merge duplicate contacts in outlook

  • Right-click and select Move >> Content 2.

content 2

  • You will see a new wizard which asks for updating duplicates while moving. Click on the Update All

By following the above technique, you will be able to merge Outlook duplicate contacts. However, often this technique proves to be complicated for beginners or non-technical users. So, we suggest you choose a professional tool.

Professional Solution to Merge Duplicate Contacts

DRS PST Merge Tool is the most suitable application for users who refrain from performing complicated steps to combine contacts in Outlook. It provides all required options needed while combining multiple Outlook items like mail, contacts, calendar, etc. Along with all that, the tool is built with an interactive and simple user interface for easy navigation.


I hope this article provides you with all useful information regarding how to merge duplicate contacts in Outlook. You can perform the DIY method in the Outlook application. If you do not want to go through complicated steps, choose DRS PST Merge Tool to add multiple contacts in Outlook in no time.


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