I have done a WorkItemMigration from one DevOps to another DevOps. In my test environment everything worked fine. But in the live system, all the images in the discussion comments are removed. Is there any setting that can cause missing images?
You need to set a PersonalAccessToken for the source and the target and then set "tachmentLinks to true.
This will use the rest API to download the image and ad them as additional attachments on the work item.