So, a new contact will be created for the same person. It is a major cause of duplicate contact creation. The common reasons due to which duplicate contacts are created in Outlook 2016 are listed for you to understand the scenarios and avoid repeating them. Reasons Behind Duplicate Contacts in Outlook 2016
Hence, to resolve and remove duplicate contacts in Outlook we should first know the reasons behind the issue so that it can be prevented in the future. Unfortunately, there is no undo process to remove duplicate contacts instantly. Download Kernel for Outlook Duplicates Remover tool to quickly detect and remove duplicate items from your Outlook PST mailboxes.
