Using Team & Group Chats
Can I send a one-way chat?
Yes, admins have the ability to select disable replies when creating a team or group chat. This means that if you want to send one-way communication to your team or group, you can disable their ability to reply.
Creating a one-way chat
Select Chat.
Choose the Team/Group Chat option.
Select the "Disable replies" option to make the chat one-way.
Send your message.