Outlook 2016 updated something today and ever since I keep getting duplicate emails, sometimes 2 or 3 of the same email. I am using a pop3 account and there are no duplicate emails when using web-mail. This just start today and I know there was an update because when I started Outlook it had an update message that showed up. This message said there are new features, Black theme, ability to copy/paste attachments, etc.
I ran scanpst.exe and there are no errors in the pst file. What could be the issue with the new update?