When we upload a document with custom defined document properties to our SharePoint library, the custom properties are stripped. They are no longer in the document on SharePoint. When they're downloaded from SharePoint they are no longer in the document.
The Word files we are given have term management properties applied to them within a customer's SP. We amend the Word docs and then upload those docs to our SP. At this point the properties are stripped. We require the properties to stay intact throughout this process. Is there a setting to allow these properties to "pass-through" to our system?