Mistakes happen. Fortunately, you can edit or delete the messages sent in Teams. 

Edit a sent message

You can edit any message that you have sent to a chat or channel.

1. Hover over the message and select Edit .
2. Edit your message, then select Done  to save the update.

There's no limit to how many times you can make changes to a sent message.

Delete a sent message

If you need to backtrack and delete something you just sent, go to the message and select More options  > Delete.

If you haven't sent the message yet, select Format  to expand the box and then select Delete  in the upper right-hand corner.

Undo a deleted message

Go to the deleted message and select Undo.