Send a co-worker or entire team a notification to get their attention when you use @mention.

Get one person's attention

  1. Type a message in a reply or start a new conversation.

  2. Type @ and the person's name.

  3. Select the person's name you want to mention.

  4. Finish your message and select Send.

Get an entire team or channel's attention

  1. Type a message in a reply or start a new conversation.

  2. Type @team or @channel.

  3. Select the team or channel you want to mention.

  4. Finish your message and select Send.


Source: Microsoft