msg

Send a message to a specific user or session. More information: https://learn.microsoft.com/windows-server/administration/windows-commands/msg.

• Send a message to a specified user or session:
  msg {{username|session_name|session_id}} {{message}}
• Send a message from stdin:
  echo "{{message}}" | msg {{username|session_name|session_id}}
• Send a message to a specific server:
  msg /server:{{server_name}} {{username|session_name|session_id}}
• Send a message to all users of the current machine:
  msg *
• Set a delay in seconds for a message:
  msg /time:{{10}}