To search for messages, people, or files, start by typing a name, keyword, or phrase into the command box at the top of the app.
Open the Messages, People, or Files tabs, depending on what you're looking for.
If you're searching within your messages or files, make your search even more specific by clicking Filter , which appears above your search results. You can filter messages by date, subject, author, and more.
Tap Search and enter a search term or phrase. Tap Messages or People to narrow your results.