Hello. After the latest collective Windows 10 v1607 patch (KB3206632), Outlook is downloading all messages and duplicating those already downloaded. Does anyone know how to stop it? Greetings.
Hi. While in Outlook, go to File>Info> Account Settings> and in the account settings, check if you have any duplicate POP3 account. I that's the case, get rid of them and relaunch Outlook. Alternatively, if you have only one account, delete everything and set up a new profile. And let us know, if you still have the same problem.