MyMessagesExternalMessageIDArrayType
Contains a list of up to 10 external message IDs.
Type that uses MyMessagesExternalMessageIDArrayType:
Call that uses MyMessagesExternalMessageIDArrayType:
Field
Currently available on the US site. A message ID that uniquely identifies a message for a given user. If provided at the time of message creation, this ID can be used to retrieve messages, and will take precedence over the message ID. A total of 10 message IDs can be specified.
See the Field Index to learn which calls use ExternalMessageID.