Attachment size limit for ServiceNow SOAP API

Problem:

• In the ServiceNow (SOAP-based/XML) inbound message in ONEiO, you will find the attribute sf:warning with value:

  "Discarding attachment. Unable to retrieve attachment file '${some-file-name}' with sysld '${some-sys-id}' from ServiceNow: '${inboound-endpoint-name}', transactionld: '${some-transaction-id}'"

• The message may go through but as stated, the attachment was discarded as it is larger than 5MB from the ServiceNow side.

Reason:

• ServiceNow (SOAP-based API / XML) is known to have a limit of 5MB. 

Solution / Recommendation :

• This is a known issue from ServiceNow(SOAP-based/XML).
• Please check the link from the ServiceNow community on the possible workarounds about the situation and on increasing the default 5MB limit:
  • https://www.servicenow.com/community/now-platform-forum/attachment-size-limit-for-outbound-soap-messages/m-p/1082038#M38427 
• Limitations of ServiceNow Attachment limitations as stated from the ServiceNow documentation:
  • https://docs.servicenow.com/bundle/tokyo-application-development/page/integrate/inbound-soap/reference/r_AttachmentCreatorSOAPWebService.html