By setting the cached exchange mode, the OST file, which is stored on your computer's hard drive, functions as a local copy that remembers changes made in Outlook when there is no online access. The OST file must sync with the exchange server to reflect the changes you made offline since it contains emails, settings, reminders, and other data. 

The Outlook OST file is where?

One of the places listed below holds the OST file. Follow the route manually in File Explorer or copy the specified path URL to find the OST file on your Windows computer.

•    C: UsersuserAppDataLocalMicrosoftOutlook for Outlook 2021, 2019, 2016, and 2013. 
•    Outlook File in My Documents for Outlook 2010
•    For Outlook 2007, go to C: UsersUser NameApp DataLocalMicrosoftOutlook. 
•    For Outlook 2000 and 2003, go to C:UsersUser NameOutlook. 
•    Documents and Settings, or C: Local Settings, Application Data, Microsoft Outlook, and User Name

Why There Are Duplicate Emails in the OST file?

Let's first comprehend the typical reasons for duplicate email items in Outlook OST before going on to the solution:

•    incorrect setup of the rules
•    Short time between message sending and receiving
•    account setup failed incorrect email settings
•    technical issue

Why is it Crucial to Get Rid of Duplicate Emails From OST Files?

•    Microsoft Outlook is a popular email program, thus it's crucial to get rid of duplicates for them to function. Duplicate emails, however, might negatively impact your productivity.
•    Outlook duplicate emails can slow down inbox performance and even result in mistakes.
•    Due to the duplicate email, the OST is enormous when looking for a specific item, increasing the search time.
•    Duplicated Outlook emails cause the file to grow too big, which corrupts the OST.
•    For users who must manage a high volume of emails every day and respond to each one, duplicate emails can be a major problem.

Alternative Technique for Removing Duplicates from Outlook OST File

Duplicate email removal from the Outlook OST file is crucial. You can use the Outlook cleaning tool to delete duplicate emails from an OST file. But it is invalid for OST files. Therefore, people should turn to automated solutions in these challenging circumstances. Softaken Email Duplicate Analyzer. This strong and distinctive tool makes it simple to eliminate duplicate emails from Outlook OST files. This program can erase duplicate contacts, notes, tasks, diaries, and more in addition to email. The best way to remove duplicate emails from an email field is to use this method. The safest option, then, is one that keeps your original data intact and doesn't modify them in any way.

Follow Some Easy Steps to Delete/Remove Duplicates From Outlook

•    Install the Softaken Outlook OST Duplicates Remover Tool.
•    Select the duplicate OST files.
•    Preview OST files.
•    Filter OST files by emails, attachments, tasks, journals, notes, etc.
•    Select the location to save new OST files.
•    Click on the “Remove Duplicate Mail” Button and start eliminating duplicate OST emails.

The Advantages of this Software

•    All versions of Windows and Outlook are supported, including Outlook 2019. Outlook 2019 can save partner relationship attributes and folder hierarchy during this operation.
•    This utility can be used to delete duplicate OST files by both professional and lay users.
•    This program can eliminate duplicate files "across folder" or "each folder."
•    This app can handle any large-size OST email.
•    Give a free demo version to all users.

Conclusion

Workflow in Microsoft Outlook can be significantly impacted by even minor issues. Therefore, when users see identical emails in an Outlook OST file, it becomes a major issue. Therefore, it is crucial to appropriately address the duplicate email problem to maintain the continuity of daily email operations. Therefore, we discuss the best and safest method to eliminate duplicates from an Outlook PST file in this article.