Read receipts in Teams for your personal life let people know when you’ve seen their messages, and let you know when they’ve seen yours. When a message is read, a Seen icon will appear next to the message in the chat window. Otherwise, you'll just see a confirmation that your message was Sent .
Read receipts are enabled by default, and are available in group chats and one-to-one chats.
To see who’s read your message in a chat, tap and hold the message, then tap Read by.
Tip: Everyone will have to have read receipts turned On for messages to be counted as Read.
To turn read receipts on or off:
Select the Menu icon .
Select Settings .
Select Messaging .
Move the Read receipts slider to toggle on or off.