Hi popowich,, I have a similar problem. I used this fix unsuccessfully. I was just reviewing emails in a folder (with subfolders) and while clicking on the little arrow arrow next to the file name, all the email in the folder disappeared. I'm not certain if they were all read but all of it disappeared. I did NOT delete them with a delete key. I must tell you that I just started using Outlook 2016 on a brand new laptop with Windows 10. My navigation skills aren't so good yet. I've tried everything I know to find the missing emails but haven't yet. Note also that I checked "filtering" and there is noting set. Oh, while I was clicking around the Title above list emails, where you see "All, Unread, Mentions, Newest"...the mail came back in a flash but I clicked again and they were gone. I clicked around to get them back with no luck. I would appreciate your help; it's making me CRAZIER than I already am. Many thanks. Sharon in Allentown, PA ;0)