Folder with messages number bracketed shows no messages when opened. Why?
My Outlook 2013 pop3 account shows a folder with subfolders containing many messages. The data file name is designated "pop3-IMAP.170521.pst". It is the only folder with the number in brackets "filename [nnn]". When I open the folder it shows no messages nor are any of the messages in the subfolder visible. How can I correct this?