Desktop:
1. Hover over the 
Search icon on the top right of the screen.
2. Click on it and type your search keywords. You can narrow your search by the various filters available (messages/files/To-Dos/meetings/Conversations/Users) and press the return/enter key.
3. The results are displayed for the searched keyword.
Mobile:
1. Tap on the Search icon on the top right side of the screen.
2. Type what you are looking for in the search field. You can narrow your search by the various filters available (messages/files/To-Dos/meetings).
3. The results are displayed for the searched keyword.