I have a MacBook Pro (2018) running Catalina (10.15.3). I have not been able to search for emails in Outlook installed on my computer (I don't recall ever being able to do so).
Upon further investigation, Spotlight search also returns incomplete results – It seems to return everything except for files and certain folders stored on Mac.
I have attempted to reindex my hard drive and iCloud Drive folders using system preferences>spotlight>privacy, but am not successful. I have also attempted to reindex using terminal, with no success. Spotlight does appear to be reindexing every time I do this, but when it is finished, it still fails to return files stored on my desktop and Outlook search does not search any mail (even when I'm searching for an email at the top of my inbox).
Any advice would be greatly appreciated.