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Remove Duplicate Tasks

Remove Duplicate Tasks
Deletes duplicate Outlook tasks in the selected folders. It is possible to retain the original folder structure for undo.
Version: 4.21 released on May 11, 2023.
(4.7 / 113 reviews)

Remove Duplicate Tasks for Outlook
You can download a free limited version down below

This utility helps to remove duplicate tasks in Microsoft Outlook. It quickly locates and deletes duplicate tasks in multiple selected Outlook folders, saving time and effectively reducing clutter. It is possible to retain the original folder structure to undo.

Main features

  • Removes duplicate tasks from multiple Outlook folders at once. You can select specific folders to scan for duplicates.
  • Can move duplicates to a separate Outlook folder without deleting them immediately. This allows you to review the tasks before eliminating them or restore them if necessary.
  • Preserves the source Outlook folder structure. This option allows the exact recovery of the removed items.
  • Compares the tasks by user-defined fields, making the matching process more flexible. You can remove the items you need, even if they are not a perfect match.
  • Lets you set a folder priority to keep original tasks in their place. You choose where to leave originals, and the utility removes all the same items from other folders.
  • Removes the newer items and leaves the oldest in place. This saves you from having to identify the originals each time.
  • The Professional Edition includes a command-line application for bulk deduplication of multiple mailboxes. You can also use this option to schedule the utility runs.
  • Generates a log report with detailed performance information. This allows you to check the number of items processed and any errors that may have occurred.

Why do tasks duplicate in Outlook?

Duplicate tasks are created due to various reasons, such as syncing issues between devices, restoring backups, and user error.

Read about the reasons for Outlook duplicates in our blog. Here you can learn more about what causes Outlook duplication and how to prevent it.

Why remove duplicate Outlook tasks?

Removing duplicate Outlook tasks is essential to maintain an organized and efficient task management system. Identical to-do items cause confusion and lead to missed deadlines or overlooked objects. Disorder in your to-do list makes it difficult to effectively manage and prioritize your goals.

Another reason for deduplication is that it frees up space in your mailbox and improves Outlook's performance.

How to manually delete duplicate Outlook tasks

To manually delete duplicate tasks in Outlook, you can sort them by necessary fields such as Due Date, Assigned To, and others. To do this, go to the Tasks section of your Outlook mailbox and click View > View Settings > Sort.

Once the tasks are sorted, find and remove the duplicates one by one.

Drawbacks of the manual method:

Manually removing duplicate tasks in Outlook is a tedious and time-consuming process, especially if there are many items to compare. It is easy to delete important information by mistake or to miss something and keep duplicates.

How to automatically remove duplicate tasks in Outlook

This tool allows you to automatically find and remove duplicate tasks within and across multiple folders, saving time and reducing the risk of manual error.

Benefits of automatic approach

Automatic duplicate task removal ensures the accuracy of your Outlook to-do list. It helps you get rid of similar tasks by identifying them by the chosen fields, such as Due Date, Body, Priority, and others. You can configure the tool in different ways, specifying which folders to process, where to leave originals, and whether to eliminate duplicates immediately or move them to another Outlook folder. The settings can be saved for future use.

Steps to automatically remove duplicate tasks in Outlook

  1. Open the utility from within Outlook or as a standalone application.
  2. Click the Configure... button to choose which mailbox folders to scan for duplicates.
  3. Select the option to delete duplicates permanently or move them to a specific Outlook folder.
  4. The tool automatically searches for duplicates in each folder individually, but you can choose to search across folders if you prefer.
  5. By default, the utility deletes newer identical tasks, leaving the oldest ones in place. However, you can prioritize certain folders to keep the tasks you consider to be originals there.
  6. You can use custom fields for comparison. To do this, select the relevant checkbox in the General tab and go to the Fields to the Compare tab to select the criteria for matching.
  7. Once you've configured the tool, you can save your settings.
  8. Click Run to start the process.
  9. On completion, a log report shows the actions taken and any errors.

Bulk removal of duplicate tasks in Outlook

The Professional Edition of this utility supports the bulk removal of duplicate tasks from multiple mailboxes using the command-line application. This feature allows the use of scripts and batch files. It can be used for scheduled and regular duplicate removal.


Can I use this tool to delete similar Outlook tasks that are not full duplicates?

Yes, the tool offers customizable criteria for comparing and deleting or moving duplicate tasks. Enable the "Fields to compare" option in the General tab, then choose the necessary fields to compare in the same-name tab.

How to restore accidentally removed tasks?

If you have selected the "Move duplicates to folder" option instead of "Delete duplicates permanently," you can easily restore them later using the Merge Folders utility. This tool returns the removed tasks. The original folder structure is also retained.

Can I use this utility to remove duplicate tasks from multiple mailboxes in bulk?

Yes, the Professional Edition of the utility includes a command-line application for bulk deduplication from multiple mailboxes, including Exchange Server public folders and shared mailboxes.

Can I preview the duplicate items before removing them?

Yes, you can choose to move the duplicates to a specific folder rather than permanently deleting them. This allows you to preview the removed tasks and restore them if necessary.

Why do the removed duplicates not appear in the Deleted Items folder?

To find the removed duplicates in the Deleted Items, switch to All Folders mode. On the right side of the screen, select More Apps > Folders to view all folders and subfolders of your mailbox.

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All utilities easily integrate with Outlook (optionally)

* This utility is for non-commercial home use only. It will not run in domain enviroment. Some of the described features and support for domain enviroment are available in advanced version of the utility only. Free version may have additional limitations.

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