There are multiple ways you can send an instant message in Teams, which is one of the ways Microsoft is aiming to make communication more effortless than ever.
Sending a Chat in Microsoft Teams from the Chat Tab
- From the Chat tab, select a recent conversation from the list to jump back into, or click the New Chat button next to the Chat dropdown menu.
- Type your message in the Message box and hit the Send icon to send.
Note: If you need to move the conversation past a chat, you can start a voice call, video call, or screen share session from your conversation.