There are a couple of levels at which Instant Search in Outlook can break. You can troubleshoot Instant Search in the mentioned order in this article.
this workaround but are providing this information so that you can implement this ... However, the indexing of Outlook data occurs only when Outlook is running.
By default, the Indexer indexes any Outlook mailboxes on the
Outlook 2016 adds all emails synced to your machine to the index by default and uses
Thanks for the tip "Find and Delete Index files to Rebuild the Index": this worked great for me! I have Outlook 2016 running on Windows 10. The " ...
Do note that while the index is being rebuilt searches probably won't work,
Launching X1 Search and Outlook email client For best performance
In this case, the indexing of your Microsoft Windows and Microsoft
Office for Mere Mortals has been running for over 20 years, we've never,
This is a machine-based file, which means it holds search index data for all users