|@beachyhbt - Yes, and this is what I got: https://cldup.com/NhgmE-doov.jpg|
From my previous screen snip, you can see that the original e-mail has a subject of 'BBB'. When I search for this in my Inbox, I get 2 hits - the original e-mail and another one. But when I widen the search to all folders, I get no matches at all! Not even the 2 in my Inbox!!!
I have had this problem with Outlook searching on many occasions, even though I have rebuilt my search index more than once, trying to fix the problem. I have searched for things in my Inbox and got no hits even though I could see one on my screen to begin with. I find search to be completely unreliable.
Because of this, @beachyhbt, I can't really investigate your suggestion to see if it might have been 'relocated to another folder'... I have no reliable way of searching for this.