Once a file is saved in InDesign 2024 (version 19.0), the structural code changes. New features (like auto-styling, new table borders, or Cloud Documents) cease to exist in older versions. If you try to force open a new file in an old app, InDesign will crash. Therefore, Adobe removed the "Export to Older Version" feature entirely after CS6.
Open InDesign documents in previous versions - Adobe Help Center how to convert indesign file to older version link
The purpose of this report is to provide a clear, step-by-step guide for users who need to convert a modern Adobe InDesign document (e.g., CC 2024/2025) into a format compatible with an older version of InDesign (e.g., CS6, CC 2018, or CC 2020). Once a file is saved in InDesign 2024 (version 19