How to Delete Duplicates in Outlook: A Step-by-Step Guide

As a busy professional, it's frustrating when duplicate calendar entries clog up your Outlook program and cause it to hang frequently. If you're like many users who encounter this issue, you may be wondering how to remove duplicate calendar entries in Outlook 2010 or later versions.

Understanding What Causes Duplicate Entries in Outlook

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Before we dive into the solution, let's explore what causes duplicate entries in Outlook. There are several factors that can lead to this problem, including:

* Synchronizing your Outlook account with multiple mobile devices

* Importing data from another email client or application

* Using third-party add-ins or plugins

* Corrupted PST files

In my case, I recently synchronized my Outlook account with multiple mobile devices and received a shocking number of duplicate appointment and meeting entries. Upon closer inspection, I discovered that I had around 4100 duplicates of one individual entry and approximately 800 duplicate calendar entries.

Removing Duplicate Calendar Entries in Outlook

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Fortunately, there are several ways to delete duplicates in Outlook. Here's a step-by-step guide to help you remove them:

### Method 1: Using the 'Remove Duplicates' Feature

Outlook 2010 and later versions come with a built-in feature that allows you to remove duplicate calendar entries.

1. Open your Outlook calendar.

2. Click on the 'Home' tab in the ribbon.

3. Select the 'View' group.

4. Click on 'Current View' and then select 'Custom Views.'

5. In the 'Manage Custom Views' dialog box, click on 'New.'

6. Name your new view (e.g., 'No Duplicates').

7. Click on the 'Criteria' button and enter the following formula: `Received >= 'Today' - 30`

8. Click 'OK' to apply the changes.

9. In the 'View' group, click on the 'Apply View' dropdown menu and select your new custom view.

### Method 2: Using a Third-Party Add-in

If you're using an older version of Outlook or prefer a more manual approach, you can use a third-party add-in like Duplicate Cleaner for Outlook. This tool allows you to scan your calendar for duplicates and remove them with just a few clicks.

1. Download and install the Duplicate Cleaner add-in.

2. Launch the add-in and select the calendar folder you want to clean.

3. Click on the 'Scan' button to identify duplicate entries.

4. Review the results and select the entries you want to delete.

5. Click on the 'Delete' button to remove the duplicates.

Tips to Prevent Duplicate Entries in Outlook

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To prevent duplicate entries from occurring in the future, follow these tips:

* Regularly back up your Outlook data to avoid data corruption.

* Use a reliable antivirus software to scan your computer for malware.

* Avoid using third-party add-ins or plugins unless they are trusted and reputable.

* Keep your Outlook version updated to ensure you have the latest features and bug fixes.

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Removing duplicate calendar entries in Outlook is a simple process that can help improve your email client's performance and reduce frustration. By following the methods outlined above, you can quickly delete duplicates and get back to focusing on your work or personal tasks. Remember to take proactive steps to prevent duplicate entries from occurring in the future by regularly backing up your data and using trusted software.

How to delete duplicates in outlook