While using the Instant search option, the outlook may require more than the desired amount of time to list down the messages.Facing the below-stated problems will help you to find the one that is affecting you. Outlook generally requires loads of sources. Microsoft Outlook is a complex application. If you remove duplicate emails in outlook 2013 measures, you can increase the size of the email box which will further affect the users' flow of work. It slows down the system, affects the performance rate, storage capacity is reduced and the hanging of other problems keeps on pondering. Part 1: What happens when duplicate emails occur in Outlook 2016/2013/2010?ĭuplicate emails make the entire email managing features very difficult for outlook users. Bonus tip: How to recover emails deleted accidentally in Outlook.Part 3: How to efficiently delete duplicate emails in Outlook 2016/2013/2010/2007.Part 2: Possible causes of duplicate emails in Outlook.Part 1: What happens when duplicate emails occur in Outlook 2016/2013/2010?.