Outlook for Mac - search function not working for email messages

The search function for Outlook is dependent on the native OS X Spotlight search function. Because the Outlook app on your computer synchronizes email from the server, a Spotlight re-index can help with search problems once the re-index is complete.

There are a couple of thing you can do:

1. Run the Outlook for Mac Search Repair Tool.
   • https://support.microsoft.com/en-us/help/4483875/outlook-for-mac-support-utilities
      
2. Force OS X to re-index the content of your Mac (i.e. Macintosh HD)
   • https://support.apple.com/en-us/HT201716
      
3. While waiting for the Macintosh HD re-index to happen (it can take some time), searching for emails via bwa.dartmouth.edu is the way to go.