A Microsoft application for managing email, calendars, contacts, and tasks across devices and platforms.
Searching emails is kind of fundamental to my and (I assume) millions of others. Given that MS has decided to break this and not fix it I've taken a different route.
I've gone back to a search product i used to use about five years ago called Copernic Desktop Search. It was good then and in the last five years it's been updated even further.
Highly recommended. Point it to the directories where you keep your documents and to any PST files (whether open in outlook or not). It takes a couple of days to index everything but once done it's a massive productivity boost.
Find anything and everything in seconds. Searches attachments. Gives you previews. Shows you where your search terms are in the targets. It's light years ahead of MS.
Worth a look.
I am not affiliated. Just a happy (returning) customer.