With GainTools Outlook Duplicate Remover Tool, it becomes very easy to remove all duplicates from multiple PST and OST files at once. Having a simplified interface, handling the software is very easy for all users.
How to remove duplicates from multiple Outlook files at once?
Download and launch the software on any Windows device. It will consume a few seconds in the downloading and installation process. Then, start the software.

Outlook Duplicate Remover Interface
Once you open the software, two options i.e. File or Folder mode are available. Select any one and then Browse PST or PST file from your local machine to the software panel.

Browse PST Files
Under Remove Duplicate Type, mark the desired items like mails, contacts, calendars, notes, etc. You can mark all items or choose the desired ones as per your requirements.
You can choose any option from the above two.

Remove Duplicate Type
Click on the Browse option and mention a path of your local system to save the resultant PST/OST file. You can specify any drive, or any folder for saving Outlook file.

Select Destination path
Move the mouse cursor to Remove Duplicate Emails. This starts the process of removing duplicates from Outlook and provides you resultant PST file within a few minutes at the location defined by you.

Remove Duplicate Emails
Your PST files have been successfully remove duplicate and save at your desired format. You can now access your PST files from the specified location.