informational announcement(An audio message that is played when a user first dials in to a Unified Messaging system that describes some temporary condition of interest to all users)
information alert(An alert that indicates that the data source and its protected namespace elements are doing well. Examples of these types of messages are the completion (either successful or not) of long running tasks that would normally be followed by further action on the part of the administrator or interesting changes in the namespace (for example, new shares or volumes on protected servers))