I’ve applied every method in this article. Nothing works. Outlook 2021 search either does not work at all, or sits for 3 minutes and slowly starts to populate with e-mails from 2017, never displaying anything recent. Quitting search freezes the program. Spent hours on phone with Microsoft tech support; useless. Then they claimed (admitted?) that there is a bug in Win11 which causes this and had idea when it would be fixed.