A. 1. Use the Correct Version: Ensure you are using the version of DingTalk that is appropriate for your region. If you are in a Western country, use the Western version. 2. Check for Updates: Make sure your app is updated to the latest version, as updates may address sandboxing issues. 3. Clear App Data: Go to Settings > General > iPhone Storage > DingTalk, and offload the app to clear temporary data, then reinstall it.

B. 4. Use Alternative Communication Tools: If sandboxing is causing significant issues, consider using other communication tools that do not have such restrictions.