A broadcast message is a message that you send to all messaging subscribers on a server. It is treated as a new message and is presented before normal messages. Broadcast messages are useful for company announcements or emergency announcements.
You create and send a broadcast message normally, except you do not address it. Instead, you mark the message as a broadcast message. You cannot send a broadcast message to subscribers on other systems or at other locations.
Message notification turns on subscribers' message-waiting indicators when the message arrives. Turn on message notification only in emergencies. The system slows down significantly when many subscribers simultaneously try to get a broadcast message.
Administer the broadcast mailbox so that the system deletes the message from the broadcast mailbox when the message expires.
With a 2-day default expiration, subscribers can receive the message for up to 3 days, that is, during the day you send it and the next 2 days. After the third day, the message can no longer be accessed.
If the broadcast mailbox already has 16 active broadcast messages, your message is immediately categorized as nondeliverable.