Duplicates Remover for Outlook is a powerful and handy add-on for finding and processing duplicate items in folders Microsoft Outlook. The program works with contacts, notes, tasks, magazine and calendar entries in Microsoft Outlook folders.

Duplicate Remover for Outlook can be used to find duplicates both in the same folder and in different folders. The found duplicates can be flagged, deleted, copied or moved to any folder of your choice.

The priority system implemented in the program can be used when searching for duplicates in several folders. Using this system, you can, for example, determine that one of two identical items is stored in the "Important Contacts" folder, and the other in the "Temporary" folder, the latter should be identified as a duplicate and deleted (marked, moved).

Duplicates Remover for Outlook is fully compatible with:

  • Microsoft Outlook 2019, 2016, 2013, 2010, 2007, 2003, 2002/XP;
  • Microsoft Office 365 with desktop Outlook;
  • Microsoft Windows 10, 8, 7, Vista, 2003, XP.

Possible actions with duplicate elements

  • Mark with a flag - found duplicates will be marked with a flag;
  • Move the flag (Remove the flag) - the flag will be removed;
  • Move to a folder... - duplicates will be moved to the specified folder;
  • Copy to folder... - found duplicates will be copied to a separate folder;
  • Copy to folder and mark with a flag... - duplicates will be copied to a separate folder and marked with a flag in their original location;
  • Delete (move to the Deleted Items folder) - duplicates will be moved to the Deleted Items folder.
  • Delete permanently - duplicates will be permanently deleted (bypassing the Deleted Items folder).

Duplicates Remover for Outlook is fully compatible with Microsoft Exchange Server and can be used to process items in shared folders on server. Also, if you have access rights to other users' folders, you can process messages in them just as you would in your own.

Demo download

You can download the demo version of Duplicates Remover for Outlook (6853 KB) to test it before buying:

Program registration

If you want to use Duplicates Remover for Outlook after the 30-day demo period ends, you need to register the program. You can register Duplicates Remover for Outlook online by choosing your preferred payment method.

Over time, Outlook can accumulate a large amount of extra elements, loading the interface and memory of the computer. You can delete them individually or erase them all at once, getting rid of the account or the program itself.

Uninstalling a program

You can uninstall the program using the standard Windows tools. Please note that for complete removal Outlook will need to be disabled separately account, otherwise, when reinstalling, all data will be restored. Disabling an account is described in the next paragraph of this article.

  1. Launch the Computer Control Panel through the Start menu.

    Opening the control panel

  2. Go to the Uninstall Programs section.

    Go to the item "Uninstall programs"

  3. Find it in the Outlook list and click on the "Delete" button. Wait while the uninstall wizard erases information about the program from your computer.

    Click the "Delete" button

Account deactivation

Disabling an account can be useful in two cases: when you need to create a new account in Outlook, resetting all information about the old one, or to completely remove the program from your computer. Also, disabling an account will reset some program settings, which can fix errors that occur in it.

  1. Close Outlook before moving on to uninstall.

    Close Outlook

  2. While in the computer control panel, find the item related to Outlook mail through the search box and open it.

    Open the Outlook section in the control panel

  3. In the expanded window, click on the "Show" button, which is located in the "Configuration" block.

    Click the "Show" button

  4. In another window that appears, select the account you want to delete and use the "Delete" button. Done, save all your changes and proceed to set up a new account or uninstall the program.

    Select an account and click the "Delete" button

Account deactivation

You can disable one of the mailboxes linked to Outlook in the program itself. The steps will be described for the program released in 2010 and its newer versions.

  1. Expand the File menu. It contains all the functions for setting up accounts and accounts.

    Open the menu "File" - "Details"

  2. Without going anywhere from the "Details" block, click on the "Account Settings" button.

    Click the "Account Settings" button

  3. In the "Email" tab, select the account you want to disable and use the "Delete" button. Done, the mailbox is disconnected from Outlook.

    Select the mailbox and click the "Delete" button

Removing elements

Deleting such items in Outlook as a calendar, folder, task, etc., is carried out using the context menu called by the right mouse button. Having opened such a menu, select the “Delete” item in it and confirm the action.

Click on the "Delete" button

You can also delete elements using the Delete key on the keyboard, after selecting them. To quickly select all elements, use the Ctrl+A shortcut, which will select all elements inside active partition.

Deleting emails and their duplicates

Any letter can be deleted using the context menu by selecting the "Delete" item in it. To delete all messages within the active section at once, select them using the Ctrl+A key combination, and then press the Delete key on your keyboard. Deleted messages are moved to the Deleted Items folder.

Select the letter and click the "Delete" button

Remove duplicate emails i.e. duplicate messages, standard means Outlook is not possible, since there is no such function in the program. Will have to use third party application Outlook Duplicate Items Remove. Download it from the official website of the developer and install it after closing Outlook. After the installation is complete, start Outlook, a new ODIR button will appear in it, click it. A window will open in which you should mark the folders containing duplicate messages and click the Remove duplicate items button. Done, all duplicates from the selected folder are erased.

Remove duplicates using Outlook Duplicate Items Remover

Video: Clean up Outlook

Over time, the folder may become full of letters, the fastest way to delete its contents is to right-click on it and select "Empty Folder". This method will work for all folders. If you empty the Deleted Items folder, then the messages and other items in it will be permanently erased, but for some time you will still be able to restore them using the "Recover deleted items from servers" function.

Click the "Clear Folder" button

Duplicate deleted emails

The error in which deleted messages are duplicated in the "Deleted Items" folder occurs due to a bug that occurs when using mail from mail with the IMAP protocol. To get rid of it, check if the IMAP settings are correct by comparing them with the data provided on the official website of the mail company. If the information matches, and the letters are still duplicated, then delete the mail and add it again using the POP protocol.

Restoring a deleted folder


Restoring items removed from the program


To exit a public conversation created for simultaneous communication between several people, just go to desired group and, expanding the "Participants" block, click the "Cancel subscription" button. After that, you will be excluded from the group and stop receiving emails sent to users in it.

Click the "Cancel Subscription" button

Cleaning Outlook makes it easier to work with the program. Erased items can be restored from the Deleted Items folder or from the server. To reset the settings, log out of your account and mailbox. When you delete the program itself, some mention of it remains in the computer's memory, so when you re-install installing Outlook they can be partially restored.

In this article, you'll learn where duplicate messages, contacts, and other Outlook items come from. We will talk about how to prevent duplicates from appearing. And most importantly, we will describe ways automatic search and remove duplicate Outlook.

If you are using Microsoft Outlook, you will definitely run into duplicates. The presence of duplicates leads to confusion and loss of time when reading and sending mail. A large number of duplicates increases the size of your mailbox, takes up extra space on your desktop and on the server. In addition, a lot of duplicates significantly increases the search time in Outlook, and the search results will consist of a large number of unnecessary elements that are difficult to understand. Read this article and find out where duplicate emails, contacts, tasks, reminders, and Outlook calendar items come from. Remove duplicates and make sure they don't reappear.

Where do duplicates appear in Outlook?

There are many situations where messages are duplicated in Outlook folders. This may be due to incorrect settings, technical failures or user errors. Duplicate messages can appear both when receiving and when sending letters. Duplicate contacts appear when copying and importing contacts, and duplicate tasks, appointments, and meetings appear when multiple users or multiple Outlook windows are working on the same Outlook items at the same time.

Here are the most common causes appearance of duplicates in Outlook:

  1. Errors or out of sync mobile devices with the desktop version of Outlook. Retrying synchronization may create duplicates.
  2. Frequent receiving and sending mail. In this case, there may be failures in data synchronization with the server, which will lead to the appearance of duplicates.
  3. Incorrectly configured Outlook rules. Different rules that work with incoming or outgoing mail can copy the same message to different folders.
  4. Breaks in receiving mail from POP3 boxes. If the "Leave messages on the server" setting is enabled, then already received messages are downloaded again.
  5. Import messages and other Outlook items from files or combine multiple PST files into one. Repeated copying of the same data will create duplicates.
  6. Restoring mail from backups. Backups messages are duplicated with existing ones.
  7. Run multiple copies of Outlook at the same time on the same computer. When working in this mode, tasks, calendars, and sent messages can be duplicated.
  8. Work with one mailbox on multiple devices. Messages are duplicated when received, sent, or synchronized.
  9. Multiple POP3 mailboxes configured for using a single PST data file.
  10. Usage antivirus programs with check function Email. Such antiviruses can create copies of messages during editing or after sending a message.

What to do so that duplicates no longer appear in Outlook

Before removing duplicates, you need to find out the reasons that led to their appearance. After eliminating these reasons, you can find and remove all duplicates in your Outlook.

Here is the checklist to check:

  1. Review the settings for Outlook rules that copy incoming or outgoing messages to folders. Make sure that the "stop further rule processing" action is enabled in each such rule. Otherwise, the next rule will copy the message again.

  2. On the Send/Receive tab of the Outlook ribbon, select Send/Receive Groups. Then, click "Define send and receive groups" and specify 15-30 minutes for the "Automatically deliver every ... minutes" setting.

  3. If you are using POP3 mailboxes, please check your account settings. On the Advanced tab, the "Leave a copy of messages on the server" setting specifies how many days to keep messages on the server after they are received in Outlook. During normal Outlook operation, duplicate messages will not appear. But when reinstalling Outlook on another computer or transferring the mail database, the next receipt of mail from this POP3 mailbox will result in duplicates.

  4. If you import messages from EML, MSG, PST and other files several times, make sure that the duplicate checking mode is enabled. Another way to avoid duplication is to move message files to a different folder after they have been imported into Outlook folders. For example, the utilities "Import messages from EML files" or "Import messages from MSG files" provide a mode of automatic movement of imported messages.

  5. Launch Manager Windows tasks and make sure the process outlook.exe launched once. If you find multiple processes with the same name, close the running Outlook. If after that it is clear that the process outlook.exe running, restart your computer. If this situation occurs repeatedly, it is most likely that Outlook hangs on closing. This can be caused by Outlook add-ins not working properly. Disable add-ins one at a time until Outlook shuts down gracefully.

  6. If duplicate messages are created when sending, temporarily disable your antivirus and send multiple messages. If the problem has disappeared, find the settings related to checking mail in your antivirus and disable them. Don't forget to turn your antivirus back on.
  7. If duplicates still appear, remove the mail accounts that are causing the duplicates and add them again. If this does not help, close Outlook, delete the profile using the Windows controls and create a new one.

How to find and remove duplicate Outlook

There are several ways to find duplicates in Outlook. The easiest is to switch the view of the selected Outlook folder to Datasheet view, delete those items that you consider to be duplicates. Such the way is fine if the folder has a small number of messages. If there are a lot of duplicates, then sooner or later you will make a mistake and delete important data. And if duplicates are in different folders, it is almost impossible to remove them manually. Therefore, if there are a lot of duplicates, use special utilities to automatically remove duplicates. various elements outlook.

Here are a few automatic ways find and remove duplicates:

  1. You can immediately remove mail duplicates by running the Remove Duplicate Messages utility. In addition, each type of duplicate has its own separate utility that does it as correctly as possible. For example, Remove Duplicate Contacts, Remove Duplicate Calendar Events and other utilities to remove duplicate Outlook items. Found duplicates can be permanently deleted or moved to a selected Outlook folder. When moved to a folder (for example, Deleted Items), the exact original subfolder structure is created. This allows you to view deleted duplicates and return them back to their folders if necessary. The Merge Folders utility can do this automatically.
  2. Instead of removing duplicates, they can be marked with a category or a flag. As well as for deletion, each type of duplicate has its own utility: Duplicate Message Finder, Duplicate Contact Finder and other Outlook duplicate finder utilities. This ensures that only the correct Outlook item types are marked. You can use the Categorize Outlook Items utility to automatically clear flags or categories from items in different Outlook folders.
  3. If you just want to see how many and where Outlook duplicates are, run the Outlook Duplicate Items Report. In addition to the main function, this report will help you find out why some almost the same messages are not duplicates. These may be minor differences in the addresses of the sender and recipients, an antivirus check stamp at the end of the message text, different names in the names and contents of attachments, and other subtle differences. After reviewing the situation with duplicates in your Outlook folders, run one of the utilities to find or remove duplicates.

Please note that in your mailboxes not only messages, contacts, appointments, meetings, and other Outlook items can be duplicated. Often, during intensive correspondence and forwarding of messages, there are duplicate attachments that are not needed and take up a lot of space. Be sure to check out the article on how to find and remove duplicate Outlook attachments.

Please note that there are already 165 free utilities and add-ons for Outlook available on our site. All of them are created at the request of our users. With the help of these utilities, you can speed up Outlook, increase your efficiency, and solve many problems that may arise.

If you import contacts from multiple sources or inherit someone else's contact list, there may be duplicate contacts that are stored in Outlook. When importing contacts from external sources such as iCloud or Gmail, Outlook checks for duplicates and lets you choose whether to create new record contact (recurring) or merging duplicate contacts. Unfortunately working duplicate contacts in the contacts folder, no no automated process to remove them. However, you can export all contacts to a file, then re-import them into Outlook and take advantage of the built-in duplicate checker. If there are only a few duplicate contacts, you can sort your contact list and remove them manually.

Remove duplicate contacts one by one tap

Removing a large number of duplicate contacts using export and import

If you have a lot of duplicate contacts, deleting duplicates one by one can be tedious and time consuming. Fast way removing a large number of duplicate contacts is to export them to a file to import them to a new folder. To use the Find Duplicate Data feature while importing to Outlook, follow these steps:

Import contacts to Outlook


Copy contacts from duplicates folder back to contacts folder


additional information

Options for resolving duplicate contacts

You have two ways to solve in the dialog box Duplicate contacts found duplicate contacts:

Adding a duplicate as a new contact new contact will be added to the folder Contacts. For example, if there is already a contact with the same name in the folder Contacts Creating a contact with the name of Elena Kupkova, there are two contacts with the name of Elena Kupkova. A single middle name initial can be added to distinguish between them.

Advice: Displaying contacts as electronic business cards is suitable for views where you need to see enough information to distinguish between contacts with the same name.

Update data from duplicate contacts to an already existing new one Outlook will compare all fields that contain data in the duplicate and existing contacts, and copy the data from the duplicate contact to all fields in the existing contact that have conflicting data. For example, if you have a contact named Elena Kupkova with a phone number of 555-0112 and receive duplicate contacts with a new phone number, Outlook will copy the new number in the corresponding field to the existing contact and leave all the fields the same.

The color categories you assign to a new contact and the text in the message box from the new contact will not be copied to the existing contact. If you want to copy information, you must do it manually. Certificates and links for contacts on the tab " actions" will be copied from the duplicate contacts and added to the existing contact without replacing the original data. However, the links on the " actions" for items other than contacts, such as tasks and appointments, will not be copied.

Each time Outlook updates data in a contact, copies of the original contact are stored in the " Remote". If you need to return to the original contact's details, you can use this copy.

Remove duplicate contacts

If imported contacts in Outlook using the same names or email addresses already entered in the folder Contacts, and the checkbox is checked Allow Duplicate Creation When using the Import and Export Wizard, unwanted duplicates of some or all of the contacts that you have imported may occur.

Removing unwanted duplicate contacts, manual process, and below is an easy way to do it.

    In chapter Contacts select the contacts folder which contains duplicate contacts.

    AT Navigation area In chapter current view select Phones. This viewing convenience allows you to view contacts and duplicate contacts. Now you can sort the list by date modified and group duplicates.

    On the menu View hover over element current view and select the item Setting the current view.

    Click the button fields, select from the list Available fieldschanged and press the button Add.

    Click the button Up until there is changed at the top of the list Show these fields in the given order.

    Double click the button OK.

    In the contact list, holding CTRL key, select all duplicate contacts.

    After highlighting all duplicate contacts, press the DELETE key.

Note: If you don't want duplicate contacts when you import contacts to Outlook, select the option do not import duplicates or in the Import and Export Wizard.

    Do not import duplicates Existing data will be preserved and duplicate data in the Personal Folders (.pst) file will not be copied to the folder Contacts.

    Replace duplicates on import Existing data in folder " Contacts» is replaced by the information in the imported PST file.

Disable search for duplicate data

When saving a group of contacts in Outlook, the process can be faster if you don't use the Find Duplicate Data feature. To disable this feature, follow the steps below.

    On the menu Service select a team Options.

    Click the button Contact options and then uncheck automatically check for duplicate contacts.

It is convenient for users who receive a lot of emails to use services to control email. With their help, you can sort, read and forward messages. Microsoft Outlook - popular program, which has the functions mail client. But if the user decides to remove this service, they may run into problems.

Uninstalling Outlook 2010 or Outlook Express

Consider removing the program itself. Perform the following procedure:

  • Open the "Start" menu and select the "Control Panel" section.
    Call the "Start" menu and select "Control Panel"
  • Open the "Programs" menu and in the "Programs and Features" section open "Uninstall a program".
    Open the "Programs" menu and in the "Programs and Features" section open "Uninstall a program"
  • In the list of programs, select Microsoft Outlook 2010 (or the version that matches yours) and click on the "Uninstall" button.
    Select Microsoft Outlook and click Remove
  • Wait for the deletion to complete. Follow the instructions provided by the program.
  • Restart your computer.
  • The removal process will be completed.

    Video: uninstalling Microsoft Outlook through the registry

    Ways to close a Microsoft Outlook account

    Let's consider two cases. First, Microsoft Outlook has not yet been removed from the computer. In this situation, do the following:

  • Run the program and open the "File" section.

    Select the "File" section

  • Open the "Settings" section and select "Account Settings".
    Open the "Settings" section and select "Account Settings"
  • You will see a list of created accounts. Select the one you want to delete and click the appropriate button.

    Select an account and click "Delete"

  • Confirm the deletion request.
  • If Microsoft Outlook has already been removed from your computer, then to delete your account, do the following:

  • On outlook.com, sign in to your account.
  • Click on your profile picture and select View Account.

    Open "View Account"

  • Go to the security and privacy section.

    Open the "Security and Privacy" section

  • Open " Extra options security."

    Open "Advanced security settings"

  • At the very bottom of the page, find and click the "Close Account" button.

    Click "Close Account"

  • Follow the instructions to continue closing the entry.

    Read the instructions and click "Next"

  • Specify the reason for deleting the account and tick all sections.

    Specify the reason for deletion and click "Mark for close"

  • The account will be closed and you will be able to continue working on the computer.

    You have 60 days to change your mind and reinstate your account

    How to remove individual items in Microsoft Outlook

    Not always the user has a need to get rid of Microsoft Outlook entirely. Sometimes you need to erase only individual elements of the program. Consider ways to remove each.

    Delete an Outlook calendar

    There are two types of calendars in Microsoft Outlook: user-created and default. Calendars that a user has created can be deleted entirely. Those that exist by default cannot be completely erased, but you can remove any notes and elements from it. To delete a user-created calendar, do the following:

  • In the menu for creating calendars, find the one you want to delete.
  • Click the right mouse button on the title of this calendar.
  • In the context menu, select the delete command.
  • Confirm the action.
  • With the default calendar created, do the following:

  • In the calendar menu, click on the "Calendar" item.
  • Click "Change Display" and choose to display the calendar as a list.
  • Highlight each item in this list.
  • Press the Delete button on your keyboard.
  • The calendar will not be deleted, but the user will not see it.
    Any calendar can be removed from the menu quick access. To do this, call context menu right-click and select the delete command.

    The main calendar cannot be completely deleted

    Deleting personal folders

    Personal folders in Microsoft Outlook are deleted in the same way as any file. Call context menu right click mouse and click delete. Unfortunately, for various reasons, this sometimes does not work. Here are two tips to follow in such cases:

  • Highlight the desired folder and press Shift+Del. This allows you to bypass many errors that occur during deletion.
  • If an error about user rights occurs during deletion, then change the IMAP protocol to POP3 in the account settings.
  • End a task in Outlook

    The Microsoft Outlook service allows you to assign various kinds of tasks and place them in messages and on the calendar. After the task is completed, it must be marked as completed so that it can be deleted. For this you can:

  • right-click on the task you want to complete, and in the window that opens, select the action "Mark as completed";
  • double-click on the task with the left mouse button, and then set 100% in the percentage display field.
  • Any of these methods will end and delete the selected task.

    How to get rid of duplicate emails

    When imported or incorrectly synchronized, letters may be duplicated. In such a case, the user may need to delete them. For this there is special utility called Outlook Duplicate Items Remover. It is designed for only one purpose and works extremely simply. Just select a folder and click remove duplicate items. You can download the program from the link: http://www.vaita.com/ODIR.asp

    Among other things, you can remove duplicates manually. For this:

  • Select the folder where you want to clean up duplicates.
  • Click "Setting View" and display the display as a list.
  • Sort files by modified date.
  • Hold down the SHIFT key and select all duplicates.
  • Right-click on the highlighted files and click "Delete".
  • Microsoft Outlook has a built-in solution for finding (but not deleting) duplicates.

    Video: remove duplicate letters using a special utility

    Deleting emails in Microsoft Outlook

    If too many letters have accumulated in the service, you can delete them. This will simplify the work and increase the speed of data processing by the program. The deletion process is the same as when deleting files - holding down the Shift key, right-click on the data you want to delete and click "Delete".

    If you want to completely empty the folder, then do the following:

  • Right click on the mail folder you want to clear.
  • Select Delete All from the context menu.
  • You will be prompted to delete items in the Deleted Items folder.
  • The Deleted Items folder stores items that have been previously deleted. Data from there can be easily restored. To completely remove items, the folder must be cleared.

    You can set this folder to be automatically cleared when you exit the program. For this:

  • In the "File" tab, go to the settings section.
  • Open the advanced settings menu.
  • In the "Startup and shutdown ..." section, check the box to clean up the folder deleted files at the end of the program.
  • If this method is inconvenient for you, you can clear the Deleted Items folder yourself. For this:

  • Find it in the folder list.
  • Right-click on the folder with deleted files.
  • A contextual command window will appear, select Empty Folder.
  • There is a bug with duplication of deleted emails. This problem occurs only when using the mail.ru mail service. The best way fix it - change it Post service. Technical support in this case will not help by redirecting to Microsoft support, which has no data about this error. You can also delete emails manually on the web service without using Outlook.

    you can recover remote folder, only if it is still in the "Deleted" section. For this:

  • In the folder list, open "Deleted Items".

    Open the Deleted Items folder

  • Find the item or folder you want to restore and right-click to bring up the context menu. Click the "Move" button.

    Click the "Move" button in the context menu

  • Select a folder to move.

    Select a folder to move the previously deleted item to

  • If you have already cleared the Deleted Items folder, then you can use Restore Deleted Items. This will help to return some of the folders or files. For this:

  • Select the Deleted Items folder and top panel Click Restore Deleted Items.

    In the top bar of the Folder section, select Recover Deleted Items

  • In the window that opens, select the items you want to recover.
  • With an item selected, click the Restore Selected Items button at the top of the window. Or click "Select All" to restore all items in this window.
  • Items will be restored to the Deleted Items folder, from where you can move them as described above.
  • When working with item recovery, you can use various methods sorting. If a desired folder not found in the "Deleted Items" or using the restore deleted items function, then the data was lost forever.

    How to remove yourself from an Outlook conversation

  • ask users to remove you from the mailing list;
  • if they do not, you can block all communications with this addressee. Just check current email address as a source of spam.
  • Delete Microsoft program Outlook is easy. A few difficulties are associated with the fact that the account is deleted separately from the program, and the process of erasing elements is not always intuitive. But these difficulties will not have a special impact on the ease of removal of the program.