[This is preliminary documentation and is subject to change.]
Returns the message type id to use for sending messages to the 'regarding' object of the ticket. Ie Customers/Equipment/Addresses etc.
Return null to indicate that no message should be sent
Namespace:Netadmin.Management.Ticketing Assembly: Netadmin.Management.Interfaces (in Netadmin.Management.Interfaces.dll) Version: release/9.0@131b654fe7332b0776120c2b44d96c6cac5ac9a2