If you are sending the file to someone else (the "link" in your request might imply sending a file to a collaborator), do not just send the IDML file.
Always double-check your Links panel before exporting to PDF. Ensure that the statuses of all images are clean. Sending an IDML file without its accompanying links folder will result in low-resolution, pixelated images in the final print. Pro-Tip: Use "Package" to Prevent Link Issues how to convert indesign file to older version link
InDesign will process the file and convert it into a new, unsaved document titled "Untitled" . If you are sending the file to someone