Hi everyone, Currently, I've been working on the task that requires changing the ContentID of MTOM attachment. The problem is that we do send the content of the file as attachment name (We do not have an impact on this part) and because we do use MTOM mechanism, then the Mendix will put the random values of ContentID as the file name. Has anyone experienced a similar or the same task? Is there any way we can access/change the contentID of the MTOM in Mendix? One of the ideas that could be possible in case of just one attachment is that we add attachment name in the header as contentId (In a web call), but I'm not sure if this is possible for multiple attachments. Thanks in advance, Kind regards, Aleksandar Alempic