How to Delete Duplicate Items from Outlook OST Files?

Looking for a solution to delete duplicate items from Outlook OST files? If so, you are now on the right page. Here, we will discuss the most efficient and fastest way to remove duplicate items from OST file in Outlook.

Microsoft Outlook provides two POP3 or IMAP protocols for setting up our email accounts. If your account is configured via the POP3 protocol, Outlook will create a PST file in Outlook. If similar items, such as Emails, Appointments, Calls, Tasks, Notes, Books, etc appear in the Outlook PST file, you can easily delete them.

However, if your account is configured with IMAP or Exchange Server, Outlook creates an OST file, which is an offline storage table. If you find duplicates in Outlook inbox, it is difficult to remove duplicates from the OST file in Outlook.

Therefore, in the following sections, we will discuss the causes of duplicate items, their consequences and the process of removing duplicate items from Outlook OST file. But before we start blogging, let’s take a look at the real-world problems faced by users.

What is the Reason to Delete Duplicate Items from Outlook OST Files?

We can see how the user is facing the issue of duplicate items in his Outlook OST file. Hence, in this section, we will discuss the causes of duplicate items in Outlook OST file.

• If the IMAP interval is set too often, less than 15 minutes, and the IMAP session takes too long to sync the mailbox, the email client will activate a new IMAP session and the number of emails in your Outlook inbox will increase. It can double or even triple.
• Some of her IMAP clients do not send an acknowledgment after receiving her successful RETR message, so the server saves the same message on subsequent connections. This happens when the network has latency or the connection is lost.
• Strangely, client-side antivirus software is also responsible for creating duplicate entries in the Outlook OST file.

What Happens if there are Duplicate Items in the Outlook OST File?

Duplicate items in Outlook mailboxes can cause serious problems such as poor software performance and productivity, and more. Therefore, duplicates should be removed from the Outlook OST file. But before we start with the removal steps, let’s understand what the consequences of duplicate items are.

• Duplicate items in Outlook affect mailbox productivity and sometimes cause errors
• Messages stored on the server are reloaded every time the application is started. This creates performance problems.
• There are more duplicates in the Outlook mailbox. It makes the OST too big and corrupts the OST file.

Automatic Solution to Delete Duplicate Items from Outlook OST Files

SysTools Outlook Duplicate Remover Software is a well-known automatic solution used by most professionals. As most of the Outlook duplication tools available on the internet only remove duplicates from Outlook OST file. But this utility can not only remove duplicates from OST files, but also from OST and BAK files. Therefore, to make this task easier for users, we have developed a unique proposal. So, to remove duplicate emails from Outlook data file, try this app and say goodbye to all the problems related to duplicate items like getting duplicate emails in Outlook.  This app simplifies the deduplication process for users by providing advanced features such as email field criteria matching and folder deduplication. All these features make the process so easy and successful for users.

Quick Guide to Delete Duplicate Items from Multiple Outlook OST Files

• First, Download and install the software

• Click Add File or Add Folder option to add OST file

• Two options to remove duplicate items: Within and Across folder

• After adding the OST file, you will be able to see all the folders it contains. Here you can easily select / deselect folders

• Now, click on the destination option to select the desired destination location to save the results file

• Check the box provided in the “Select Item Type” section to remove duplicate data from emails, contacts, calendars, journals, tasks & Notes

• Now click the Define Specify Criteria option to find and remove duplicates with specific email fields

After selecting a date filter, the next step is to select an action to apply to the duplicates, such as permanently delete, move to deleted folder, move to folder, mark and mark as expired

• After completing all the tasks, click the “Next” button to start the deduplication process

• When the deduplication process is complete, click the OK button to complete the task.

Prominent Features of Duplicates Remover Application

• Remove duplicates from password protected PST / OST / BAK files
• Delete duplicate Outlook items across multiple date ranges
• Support for removing duplicate items without installing MS Outlook
• Generate reports for unique and remove duplicates in the .csv extension
• Shows a preview of the mailbox folder before deleting duplicates.
• Compatible with Outlook PST files in ANSI and UNICODE formats.
• Free Outlook Duplicate Remover allows users to remove 25 duplicate items per folder.
• Supports Windows 11 (64-bit), 10 (32-bit and 64-bit)

Conclusion

Even a small glitch in Outlook can seriously affect your Microsoft Outlook workflow. Therefore, it becomes a serious problem when users get duplicate emails over and over again in Outlook. In order to keep the work continuity at the running speed, it is very important to handle the Outlook problem of constantly receiving duplicate emails in the right way. So there are several ways to delete duplicate Items from Outlook OST files. The user can see them all and choose them accordingly.