An array containing the dynamic content of the message. Each DYNAMIC_ELEMENT for the message referred to by the MessageID ...

An array containing the dynamic content of the message.
Each DYNAMIC_ELEMENT for the message referred to by the MessageID property shall be contained in MessageArguments whether the DYNAMIC_ELEMENT is included in the Message or not.
In addition, the entries in MessageArguments need to be in the same order as the DYNAMIC_ELEMENTs.