Outlook is key for professional communication and email exchange. Frequent users may create many Outlook items, increasing PST file size and using up One Drive or Hard drive space.
Importing Outlook items from archives or PST files is common. If the duplicate detection option is disabled during import, Outlook won’t remove duplicate items, making post-import cleanup tedious.
This article covers multiple ways to effortlessly remove duplicate items in Microsoft Outlook.
Table of Content
- Why are Duplicate Items a Problem?
- What are the Causes of Duplicate Emails in Outlook?
- How to Remove Duplicate Items on Outlook?
- Method 1: Configure the rules to remove duplicate emails in Outlook
- Method 2: Always select “Do not Import Duplicate Items” while importing Outlook items
- Method 3: Clean up the duplicates in the Inbox
- Method 4: Setting the inbox update frequency
- Method 5: Anti-virus
- Remo Outlook Backup and Migrate
- Frequently Asked Questions
Why are Duplicate Items a Problem?
- Duplicate emails lead to confusion. The user cannot confirm whether an email was replied to or not. If you continue to reply to the same email multiple times, it will lead to further confusion.
- Duplicate emails increase the size of the Outlook data files unnecessarily.
- The Outlook backups will take more space, and if you save backups at any external cloud storage, you will need to pay more for extra space.
What are the Causes of Duplicate Emails in Outlook?
- Rules are configured incorrectly: Wrong Outlook rules often cause Outlook mail duplication.
- Short send/receive interval: A short send/receive interval may trigger email duplication.
- Multiple Account Creation: The same email account on multiple systems can lead to repeated data synchronization, creating duplicate emails in Outlook.
- Improper Mailbox Settings: Incorrect mailbox settings can result in duplicate email messages, calendar entries, or contacts.
You can permanently delete Outlook emails, including duplicates. Let’s dive in!
How to Remove Duplicate Items on Outlook?
Note: Removing duplicate items in Microsoft Outlook may lead to data loss. We recommend backing up your data with Remo Outlook Backup and Migrate.
Method 1: Configure the rules to remove duplicate emails in Outlook
Verify if Outlook rules are set correctly. Incorrect rules can confuse email folders. Adjust the rules properly. Also, ensure only one instance of the Outlook application is running. Close extra Outlook.exe instances using Task Manager.
Method 2: Always select “Do not Import Duplicate Items” while importing Outlook items
Whenever you import files to Outlook using the Import/Export option, select the “Do Not Import Duplicate Items” option towards the end of the Import process to avoid importing duplicate items in the application.
Method 3: Clean up the duplicates in the Inbox
Follow the methods mentioned below to clean up the duplicates in the inbox. Outlook has several utilities and add-ins that can help you clean up duplicate emails easily.
- Start Outlook.
- Select a mailbox folder.
- Select Home > Cleanup. Now, configure the below options:
- Clean up Conversation will delete and move the duplicate emails in the conversation.
- The Folder will remove duplicate emails from any particular folder.
- Clean Up Folders and Subfolders will clean up the duplicate folders and subfolders.
- Right-click the Deleted Items folder and click Empty Folder to delete the emails permanently.
Method 4: Setting the inbox update frequency
Setting high inbox update frequency can mitigate the risk of duplication of Outlook items.
- Open Outlook
- Go to Send/Receive option on the top corner
- Select Define Send or Receive Groups.
- Set the value within 15-30 minutes and click on OK.
Method 5: Anti-virus
Duplicate files in your mailbox may result from a closed server connection or Antivirus application settings, which can create duplicates due to server issues.
When following the procedures above, you may risk data loss. We recommend backing up your data using Remo Backup and Migrate, as noted earlier.
To manually delete many duplicates, back up your data first to minimize data loss risk. Use Remo Outlook Backup and Migrate for this
Remo Outlook Backup and Migrate
Remo Outlook Backup Tool uses a simple one-click backup method to fully back up Outlook, including all Outlook rules and settings. You can schedule auto-backup of Outlook files at your preferred time. The tool supports easy migration from one computer to another and also enables Outlook to Office 365 migration.
Frequently Asked Questions
To stop Outlook rules from duplicating emails, sort your rules accordingly and select the action to stop processing more rules when needed. If you do not see all your rules, log on to your mailbox and check whether you see any additional rules configured.
The most common result of a mail forwarding loop is that you cannot receive any mail, which causes any mail sent to you to bounce back to the sender. However, if you receive many copies of every email, a forwarding loop may also cause this.
The most common result of a mail forwarding loop is that you cannot receive any mail, which causes any mail sent to you to bounce back to the sender. However, if you receive many copies of every email, a forwarding loop may also cause this.
