Message ID set by Btwentyfour Open Commerce Platform.

retann_Required
No
retann_Examples
 <returnAnnouncement text="Btwentyfour Example Returns Announcement" environment="Production" currency="EUR" messageId="123456" messageDate="2021-12-09T12:19:05.167Z"> 
retann_Xpath
/b24Message/returnAnnouncement/@messageId
retann_Sort
1300
retann_Id
4
retann_Type
Number