Install who by typing /who in the search bar of Microsoft Teams. after installing and allowing access to Who a menu item is added to Teams:
When you open this item you get some extra options like chat with and an Org chart:
Questions Who can answer
Here’s a list of every question Who can currently answer. Right now, Who doesn’t respond to slash commands.
|Who is||Find someone.|
|Who knows about||Find experts on a topic.|
|Who works with||Find someone’s collaborators.|
|Who is the manager of||Find someone’s manager.|