Release : 10.7.2
There are 4 IBM MQ Native Message Types and we support all of them:
Request, Reply, Report and Datagram
This Message Type also allows any other numeric value:
MQ Explorer shows the standard "Datagram" and any custom numeric values:
Only an integer value can be entered in this messageType property as per the IBM documentation.
https://www.ibm.com/docs/en/iis/11.3?topic=properties-custom-value-message-type
The JMS Send Receive step that is configured with the JMS Connection Factory for IBM MQ allows the configuration of "Custom Properties"