Cisco Unity Connection SRSV Administration- System Distribution Lists
System distribution lists are used to send voice messages to multiple users. The members of a system distribution list typically are users who need the same information on a regular basis, such as employees in a department or members of a team. At branch, sending a message to a distribution list is supported only when the distribution list is selected in the Message Recipient property of the call handler.
When you send a message to a distribution list, you receive the notification confirming that the message has been sent to the distribution list. However, the members of the distribution list will receive the message only after the restoration of WAN outage and successful upload of the message on the central Unity Connection server.
Note Composing a new message that address to a distribution list is not supported at branch.