~/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles/ will contain backups of your previous database.In my case this took about 2–3 hours on a speedy MacBook Pro. Outlook is now forced to restore its database and rebuild the index, etc. Outlook will prompt you to repair your database.to the Desktop (to keep it around until the restore is successful) Go to the folder ~/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles/Main Profile/Data (in Finder you can press cmd+ shift+ G to get there).In my case, I finally found that " alternative method 6" from that guide worked. This website seems to have the most comprehensive guides for troubleshooting this. With Mojave & Outlook 2019, however, I had to try many other methods. With previous version I had success with the Repair tool that you mention. I don't know if reverting to 12.0.1 will fix this.Outlook and macOS's Spotlight (the indexing app) have notorious problems working together. I've four accounts (three of O365 and one Gmail) and search doesn't work in any of them. I don't know if changing the name of Outlook profile or recreating this will fix this issue. It started rebuilding the Index and some emails started appearing in search results but hours later it stopped working. Mdimport -r /Applications/Microsoft\ Outlook.app/Contents/Library/Spotlight/Microsoft\ Outlook\ Spotlight\ Importer.mdimporter I added the path /Users/UserName/Library/Group Containers/UBF8T346G9.Office/Outlook to Privacy tab in Spotlight and then I deleted the entry in order to rebuild index. Delete Outlook app (moved to trash) and reinstall it Now I need to open Outlook in Chrome in order to search emails. Now my Outlook 365 search function is not working and it affected my performance at work.
Yesterday I updated my MBP to Monterey 12.1 and it was a terrible idea.