How to manually remove duplicate Microsoft Outlook items

Microsoft Outlook email communication application includes contacts, calendar, task manager, journal etc. It is considered as a more secure and protected email application to manage your data. It is simply bundled with Microsoft Office. The problem appears, when
user try to download email messages in Outlook from POP3 email server but sometimes when they tried to download messages again it may possible that the existing message get downloaded again as a duplicate message. This duplicate message problem comes due to Leave a copy of messages on the server option. As this option keeps a copy of the message on the server and increases the chances of duplicate messages.

Disable the “Leave a copy of messages on the server” option

Tools menu - > E-mail Accounts -> View or change existing e-mail accounts -> Next -> POP3 Email account -> change -> More Settings - > Advanced Tab ->  Un-check Leave a copy of messages on the server check box -> OK

 

After following these above given simple steps, duplicate copy creation on the server problem is eradicated.

If still there are duplicate items or messages available in Outlook follow the steps to delete duplicate items in Outlook that may be due to import process.

1.Go to View Menu and click Current View if you are using Outlook 2002 or 2007. For Outlook 2003 you need to follow View Menu -> Arrange By -> Current View
2.Now click Change the folder view to a table type view.
3.Column Heading will appear here just right click and select Field Chooser.
4.From the Field Chooser select All <item name> fields.
5.In the Table Heading drag the Modified field.
6.Verify the duplicate items and if you find any click Modified Headings
7.Select the duplicate items and click DELETE.

By using above given steps duplicate items problem can be removed forever and also helps in avoiding PST file from oversize or corruption issues.