Duplicate items in MS Outlook have become a reason of concern for many users. This is the user why users now days search out for solutions online as how can I delete duplicate emails in Outlook. There are various factors that contribute to Outlook items duplicacy but two of the major causes are:

• Changes in Settings of Outlook account


• Outlook is synchronized with PDAs or mobile applications

How To Prevent Outlook Items Duplication?
If the emails in Outlook are being duplicated, then possibility is there are some settings in the Outlook account that is responsible for this.  Below cited are some of the ways that could help a user to prevent replication of Outlook mailbox items again and again:

• Disable the option “Leave a copy of message on the Server” from Advance settings option.


• Temporarily disable the “Rules and Alerts” option by clicking to “Tools” in the menu bar.

However, if duplicacy in any of the other items of Outlook except emails happens like in contacts, tasks etc, the probability is that the Outlook account is being synchronized with Personal Digital Assistant (PDA). In addition to this, if any add-in is installed in Outlook, then it might be causing duplicacy of email items. The can be resolved by changing the account settings.
How To Remove Duplicates in Outlook? ( http://www.systoolsgroup.com/remove-outlook-duplicate-free.html )
There are two methods for delete duplicate items in Outlook: Manually and via external solution. From Manual method, we mean that selecting the replicated items, following the deletion process in Outlook. While on the other hand, extraneous solutions are embedded with algorithms within that helps to clear duplicate emails Outlook 2010 ( http://www.bkfrecovery.net/clearduplicate-emails-outlook-2010 ) and versions below it.
Manual Process to Eliminate Outlook Duplicates
In this section, we will explain the process to remove duplicates in Outlook 2007. For that, follow the below mentioned process:

• Open the application and from the View menu, select “Current View”.


• Change the folder view to “Table Type” view. Select “Field Chooser” by right click on Column heading.


• Click “All” fields (this option will be available on top of Field Chooser)


• Now drag the Modified Field and drop to Table heading (Make sure that the duplicates have same date). Select the items you wish to delete and press DELETE button.

If this solution does not work, then it is recommended to opt for Outlook Duplicates Remover program. Also, the manual process cited above may cause hurt to data integrity or to worse a little mistake can cause data loss.
Recommended Outlook Delete Duplicate Items Remover:  From the varied solution available online, the user can opt for Outlook Duplicates Remover software that answer users how can I delete duplicate emails in Outlook. The software is available with dual options to eradicate the replicated items from Outlook that is duplicates can be removed within and across folder.