Command line reference : fmsadmin commands : SEND command
 
SEND command
Format
fmsadmin SEND [options] [CLIENT_NUMBER] [FILE...] [PATH...]
Description
Sends a text message to a client specified by CLIENT_NUMBER, to the clients connected to the specified databases (FILE), or to all clients connected to any database in the specified folders (PATH).
If no CLIENT_NUMBER, FILE, or PATH is specified, the message is sent to all connected clients. By default, parameters are expected to be FILES or PATHS.
To specify a CLIENT_NUMBER, you must use the -c option. For example:
fmsadmin SEND -c 2 -m "This is a test message"
Options
-m message, --message message
Specifies the text message to send.
-c, --client
Specifies a CLIENT_NUMBER.
Related topics 
LIST command
Command line reference