Sending One-Way Messages
You can use a one-way text message to send announcements or information to users
client computers. The announcements appear in front of open application windows
and can be dismissed by the user.
To send a one-way text message:
Select a computer list in the Remote Desktop window.
Select one computer from the list.
Choose Interact > Send Message.
Enter your message.
The text message appears on the screen of all the selected computers.