Outlook for Mac search returns "No Results," and task items are not …
https://support.microsoft.com/en-us/topic/outlook-for-mac-search-returns-no-results-and-task-items-are-not-displayed-cf6eb856-ed4f-54e9-3ef2-546046d87c7e
In Microsoft Outlook 2016 for Mac or Office for Mac 2011, you receive a "No Results" message when you try to search for an email message or apply a filter to a folder, and task items are not displayed in the Tasks folder. Additionally, when you search for mail items by using the Mac OS native Spotlight Search, your search is unsuccessful. Cause
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