This just worked for me, to reclaim the Search function. Outlook version 16.80. MacOs 14.2.1:
No terminal commands needed.
Step 1) Re-Index your HDD
- Open System settings and select Siri and Spotlight.
- Scroll down and click the Spotlight Privacy.
- Drag the Macintosh HD to the Privacy tab.
- From the Privacy window, select the HD and then click the minus (-) button
near the bottom left of the window.
- Restart computer and re-add (+) the HD to the Siri and Spotlight Privacy window. This will start re-indexing. Re-indexing may take several hours
Step 2) When re-indexing is done, enable and then immediately disable New Outlook feature. Disable is done by "Revert to legacy outlook" in Outlook Help menu.