If you are seeing a specific number like "(68)" in your search header, it indicates that Outlook has found that many matches in your local index or initial server query . Why Results Are Limited
If your search results are consistently lower than expected or missing files, it may be due to: Troubleshooting Outlook search issues - Microsoft Support Search results for office 2016 (68)
Most users see a maximum of 250 items initially . If you are seeing a specific number like
This "cap" allows for "lickety split" response times . you can expand the search:
If the 68 results shown are not what you need, you can expand the search: