6 Effective Methods to Remove Outlook Duplicate Items

Updated On - November 16, 2023 by Deepika Singh | Reading Time: 5 minutes

Summary: Are you tired of duplicate Outlook items and finding some methods to remove Outlook duplicate items? We have covered almost every possible method to remove Outlook duplicate items. Also, suggest the top-most automated Regain Outlook Duplicate Remover tool to fix this issue.

We Use Microsoft Outlook in our day-to-day life for official and personal purposes. But when configuring it with the System comes into our mind, and we forget to remove the duplicate item, it can be laborious work, making it extremely difficult to read each mail and then delete it. Hence, we devised solutions to this problem for Outlook users in this article.

Problems you may face due to duplicate items:

  • The duplicate emails in your mailbox divert your attention and downgrade your productivity.
  • To look for specific messages, time increases because emails are duplicated in different folders.
  • Due to duplicate items in your mailbox, it becomes easy to make a silly mistake and repeatedly reply to the same message.
  • These duplicate emails take up extra server space, leading to less available storage space.
  • If the number of duplicate items is pretty high, it will slow down the Outlook performance in your System.

Methods to Remove Duplicate items from Outlook 2019, 2016, 2013, 2010, and 2007

Method 1: Ensure all rules are selected correctly in Outlook.

You must check your Outlook account to ensure your created rules are correctly organized. If they are not adequately managed, this will lead to confusion among various email folders. To effectively remove duplicate items, you must set rules correctly and close all other Outlook instances from your computer. The rules are the key player in eliminating duplicating items from Outlook because after creating a rule, you need to run it, and everything will be done automatically.

Method 2: Clean inbox regularly.

You have a lot of applications and add-ins in Outlook that can help you quickly clean up duplicate emails. To clear up your mailbox, follow the guidelines below:

  • Firstly, open MS Outlook on your computer.
  • Choose a folder in your mailbox in which you want to run the cleanup.
  • Select Home > Cleanup from the drop-down menu; set the following instructions now:
  • Clean up Conversation – all duplicate emails in the Conversation will be deleted and moved by talking to the deleted items.
  • Folder Cleanup can remove duplicate emails from any folder and send the same email to deleted items.
  • Clean up Folders and Sub-folders removes every duplicate folder and sub-folders from your mailbox system. Clean Up Folders
  • In the last step, empty the Deleted Items folder by right-clicking it and choosing Empty Folder, permanently removing the emails from your mailbox.

Method 3: Frequency to update mailbox.

It is the best option for duplicate email remover from Outlook. You can easily update inbox frequency and eliminate the issue within seconds.

  • Firstly, open Microsoft Outlook in your System.
  • Then, click “Send/Receive Groups” under the option “Send/Receive” tab in the mailbox.
  • Then, click on “Define Send/Receive Groups.” After that, a new window will open in your mailbox. In the new window, hit on the group you want to edit. By default, you can see a group called “All Accounts.” You can create a new group by clicking the “New” button in the mailbox. Manual way to remove duplicate outlook items
  • Once you have selected the group, click the “Edit” button.
  • In the new window, open the “Schedule an automatic send/receive every ___ minutes” option and choose the preferred time interval from the drop-down menu. Select the desired time limit of your choice.
  • Hit on “OK” to save the changes in your mailbox.

Method 4: Select “Do not Import Duplicate Items” in the mailbox.

This method is suitable for deleting duplicate emails from a small PST file in your mailbox. You cannot save duplicates separately or determine which folder they are located.

  • Go to File option > Open & Export > Import/Export.
  • Choose the “Export to a file” and tap Next.
  • Then, click “Outlook Data File (.pst)” and Next.
  • Then, select the folder or mailbox to export in the “Export Outlook Data File” window, and click Next.
  • You must determine the name and location of the PST file. After that, select “Do not export duplicate items” and click Done.
  • You must create a new folder in Outlook and move all the messages exported to it.
  • Then, go to File option > Open & Export > Import/Export again.
  • Then, select “Import from another program or file” and hit Next.
  • Then, choose “Outlook Data File (.pst)” and click Next.
  • You must look for the saved PST file. For this, mark “Do not import duplicates” and Next. Do not Import Duplicate Items
  • Then, mark the “Import to the same folder in, “specify the mailbox from which the messages were exported, and click Done.
  • After that, If the Import succeeds, you should delete the new folder to which you transferred the original messages.

This method does not guarantee 100% removal of all duplicates. Some messages may still be duplicated. Whether messages are considered duplicates depends on how they were created.

Method 5: Disable antivirus in your System.

You may have seen duplicate content in your email due to the server connection being closed and the Antivirus application settings being changed. Emails not marked as received will most likely create the same items in your mailbox if the server connection is not correctly shut down. To resolve this issue, look through the Antivirus application settings and turn off the email protection.

We do not encourage this methodology since stopping the antivirus can cause severe problems if a virus enters your computer via email. You will lose all your data, and turning off antivirus keeps you at bay in terms of data protection security.

Method 6: Try a third-party Outlook duplicated remover tool.

If you want a permanent removal of Outlook duplicate items, you can use a trustworthy third-party Outlook Duplicate Remover tool. The third-party solution is designed to remove duplicate emails and other duplicate Outlook objects that annoy and irritate you while using Outlook.

Regain Outlook Duplicate Remover is the advanced application to remove duplicate items in Outlook. It is the most effective and tried method for removing Outlook’s same items from your mailbox.

It gives you numerous decisions for tracking down copy things, for example, indicating a date reached to recognize copies. The software also has a free version that eliminates duplicate copies. Use the free Outlook Duplicate Remover application; you may also easily remove 30 items from each folder in its free version.

Free Download100% Secure Buy NowPrice: $29

To delete duplicate items from MS Outlook, go through these instructions carefully:

  • Download and run the Regain Outlook Duplicate Remover tool on your System. Regain Outlook Duplicate Remover Tool
  • Tap ‘Add File’ to upload PST files for scanning. Add PST files for scanning
  • Then, click the ‘Search Duplicate Items’ option to find duplicate items in the file. Display duplicate Outlook items
  • The software will show you the number of identical items in your PST file.
  • Then, mark the ‘Remove Duplicate Items’ option to remove them from your mailbox.
  • Finally, all exact items are removed, and now your PST file contains no same email messages.


The duplicate items in your Outlook mailbox can cause you many problems. Users are confused by them, and they take up much space in the data file, subjecting files to corruption and errors and affecting productivity. Even though most Outlook users can use different safeguarding methods to avoid this problem, removing identical emails from your mailbox can be challenging unless you use a professional application. As a result, many Outlook users use the Regain Outlook Duplicate Remover tool developed by Regain Software to eliminate duplicate email messages from their mailbox.


Author: Deepika Singh

My self Deepika Singh working as a Technical Writer in Regain Software. Having 4+ years experience in Writing Technical blogs, Manual Guides and Articles. I am working on all Regain Software products.

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