In Settings, search for troubleshooting, and select troubleshooting in the search results. In Windows 8.1: From Start, search for Settings. Find and click Search and Indexing, and click Run the troubleshooter. In Windows 10: Select the Start button, select Settings > Update & Security, and then select Troubleshoot. Troubleshooting Outlook search issues - Outlook, What do you do when your Outlook search function is not working? If a restart does not solve the problem, you can then try to repair the Run the Windows Search troubleshooter. Outlook also has a built-in repair tool that might help solve the issue. Updating or tweaking index locations and features may fix it when Outlook search isn't working. In the Outlook search not working may be caused by an outdated program, an indexing error, of some other problem.In the Indexing Options dialog box, select Advanced.Open Indexing Options in the Windows control panel.How do I rebuild the search index in Microsoft Outlook?, Rebuild the search catalog
