This is a bit off topic for this blog, but since Outlook is a common email client, I thought I'd pass along a little tip.
All of a sudden, Outlook started responding to searches with "No Results Found". Called Microsoft, and wonder of wonders, they sent out a bum patch. While they are attempting to fix, there is a work around. Revert back to a working build.
In Outlook, click File, Office Account, and set Update Options to Disabled.
Open a cmd prompt as administrator (right click on the command prompt icon and choose More, run as administrator).
In the cmd prompt, type (or copy / paste):
cd %programfiles%\Common Files\Microsoft Shared\ClickToRun
press Enter, then do the same with this command:
officec2rclient.exe /update user updatetoversion=16.0.7571.2109
This will run a lengthy update, but when finished, Outlook will have it's search back.
Set a calendar reminder to turn the updates back on in a month or so.