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How to Delete Duplicate Outlook items from PST/OST file?

Quick method to erase Outlook items duplicates from Outlook data files PST and OST

Perform de-duplication of Outlook items using eSoftTools Outlook Duplicate Remover software. The only reliable solution to delete duplicate items from Outlook data files. Remove duplicates from both PST and OST files with various smart options. Removing duplicates of specific types of items, removing email duplicates according to their attributes, finding duplicates within folder and across all selected folders.


Download eSoftTools Outlook Duplicate Remover Software and run it on your windows computer.

Press the Select PST or OST file button from the first screen.

Outlook Duplicate Remover Software Main Screen


Choose a mode for adding Outlook data files from the available 2 options: -

  • Add Single PST or OST file: - Load a single OST/PST file at a time.
  • Add Multiple PST or OST file: - Load several data files in a single process.

Select any one option and click on the Next button.

single/bulk Outlook file selection

Import Outlook data files with your selected file adding option.

After adding files, press the Start Scanning button.

add outlook PST/OST files

Start the PST/OST file scanning process and load the data from outlook files.

scan and load data from Outlook files


Load all data including folders and their inner items from the added files. Read Outlook items and view their duplicates in the preview panel.

open data file and view outlook items


Choose required folders and press the Remove Duplicates button from menubar.

Choose the required option and apply needed settings in the next screen.

Remove Outlook items settings and options

Settings for Outlook Items de-duplication with Outlook Duplicate Remover: -


After all selections and settings, press the Remove Duplicates button and start the job of removing duplicates from PST/OST files.

De-duplicate/remove Outlook items duplicates