Last updated: September 2016
When you search in a Public Folder that you've added to your favorites in Outlook 2016, no search results are returned or you may not see content in the Public Folder at all.
We're investigating this issue and will update this article when we have more info. To workaround this issue in the meantime, turn off cashed public folder favorite, by going to File > Account Settings > select your Microsoft Exchange account > Change > More Settings > Advanced > clear the Download Public Folder Favorites checkbox.
You can also remove public folders from your favorites. For more information, see this article: KB 3169741: No search results in public folder favorites in Outlook 2016.
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