Suggestion: If you want to remove duplicate email messages in PST files so, you can go for a reliable solution.

In the following section, we will discuss several ways to remove duplicate recipients from the To/Cc/Bcc field in the Outlook suite. You can either move on with the daily tasks or attempt to Delete Duplicate Email Addresses in Outlook. Hence, nothing important can be performed, apart from removing the duplicates. Whenever a user enters To/Cc/Bcc field while sending an email then, duplicate recipients can be seen often. To Remove Duplicate Recipients in Outlook manually whether it is emails, contacts, or calendar entries not only create confusion but also occupy non-essential space in the Outlook PST file. In fact, this unneeded task is either importing old data or fetching duplicate recipients from MS Outlook account. However, Whenever these professionals need to deal with some extra and unnecessary tasks, it becomes a bit complicated for them. Nowadays, most professional users are unable to perform their daily work routine due to the amount of workload. How to Remove Duplicate Recipients From To/Cc/Bcc Field in Outlook

Delete duplicates in outlook 2013