I have 14 MBP with Monterey. Here is how it worked for me- Went to /Users/(username)/Library/Group Containers/UBF8T346G9.Office/Outlook folder. Outlook 15 Profiles folder had folder named as Com Profile. Renamed it to - Main Profile. Went to spotlight setting> Privacy. Dragged the Main Profile folder to it to add, after it was saved, removed it. Restarted Outlook, boom it worked