Find Duplicate Messages for Outlook for Windows

Used Find Duplicate Messages for Outlook for Windows?

Editors’ Review

Download.com staffFebruary 24, 2026

This utility finds and marks duplicate messages within Outlook folders. It safely identifies duplicates with flags or categories for manual review, without automatically deleting any items.

Pros
- Marks duplicates using flags and/or categories
- Non-destructive process only marks duplicates without removal
- Includes an integrated add-in to run from within Outlook
- Provides a standalone application for use without Outlook running
- Advanced version searches across multiple folders and storages
Cons
- Does not automatically delete or move marked duplicates
- Cross-folder duplicate search requires the advanced version
- Customizable comparison fields require the advanced version
- Folder priority configuration requires the advanced version

Find Duplicate Messages for Outlook for Windows

Used Find Duplicate Messages for Outlook for Windows?

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Full Specifications

GENERAL

Release: January 20, 2020

Latest update: February 24, 2026

Version: 4.14

OPERATING SYSTEMS

Platform: Windows

Operating System

Windows 7
Windows Server
Windows 8
Windows Vista
Windows XP
Windows 10
Windows 2003

Additional Requirements: Microsoft Outlook 2003/2007/2010/2013/2016/2019/365

POPULARITY

Total Downloads: 117

Downloads Last Week: 12

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Developer’s Description

By Relief Software

Find and mark duplicate messages in Outlook folders with flag/category.

Free and easy way to find and mark duplicate messages in Outlook folders with flag and/or categories. The whole operation is completely safe, because the utility only marks duplicates without removing them from your mailbox, public folder or other storage.Advanced version allows you to select fields to compare, finds duplicates across different folders and storages and supports the priority of Outlook folders.For your convenience Outlook add-in allowing to run the tool right from Outlook and standalone launcher application allowing to run the tool without the need to run Outlook are included in the product.