Another way to avoid duplication is to move message files to another folder on your disk after they have been imported into Outlook folders. If you import messages from EML, MSG, PST, and other files several times, make sure that you have turned on the duplicate check mode.However, if you reinstall Outlook on another computer or move the email database, the next time you receive an email from that POP3 mailbox, it will result in duplicates. If Outlook operates normally, no duplicate messages will appear. On the "Advanced" tab, the "Leave a copy of messages on the server" option indicates how many days to store messages on the server after they are received in Outlook. If you are using POP3 mailboxes, check your account settings.Then, click the "Define Send/Receive Groups", and specify 15-30 minutes for the "Schedule an automatic send/receive every" option. On the "Send / Receive" tab of the Outlook ribbon, click the "Send/Receive Groups".Otherwise, the next rule will copy the message again. In each rule, make sure that the "stop processing more rules" action is enabled. Review the Outlook rules that copy incoming or outgoing messages to folders.After you have resolved all such issues, you can find and delete all the duplicates in your Outlook. What you need to do to prevent duplicates from appearing in Outlookīefore you remove duplicates, you need to understand their causes. Such antiviruses can create copies of messages while you are editing or after you send a message.
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Use of antivirus software with the email scanning feature enabled.Multiple POP3 mailboxes configured to use the same PST data file.Messages are duplicated when receiving, sending, or synchronizing. Work with a single mailbox on more than one device.When you work in this mode, tasks, calendars, and sent messages may be duplicated. Running multiple copies of Outlook on the same computer at the same time.Backup copies of messages are duplicated with existing ones. Copying the same data will create duplicates.
Repeated synchronization attempts can create duplicates.
These are the most common reasons cause of duplicates in Outlook:
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Duplicate contacts appear when you copy and import them, while duplicate tasks, appointments, and meetings appear when multiple users or multiple Outlook windows work with the same Outlook items at the same time. Duplicate emails can appear when you receive or send a message.
This may be due to incorrect settings, technical failures, or user errors. There are many situations where messages get duplicated in Outlook folders. Remove the duplicates and make sure that they no longer appear. Read this article and find out where the duplicate messages, contacts, tasks, reminders, and Outlook calendar items appear from. In addition, many duplicates significantly increase the search time in Outlook, and the search results will consist of a large number of redundant items that are difficult to work with. A large number of duplicates increases the size of your mailbox, taking up extra space on your disk and on the server. Having duplicates causes confusion and can be a waste of time when you read and send an email. If you use Microsoft Outlook, you will definitely encounter duplicates.