Follow these steps to troubleshoot Outlook not properly saving or syncing email attachments:

1. Check your Outlook account settings to ensure that Outlook is saving your emails and attachments in the correct folder.
2. Check your internet connection to make sure that your connection is stable.
3. Close and restart Outlook, to clear any temporary issues caused by using the program for an extended period of time.
4. Make sure you've installed the latest version of Outlook.
5. Check for any system updates or reinstallations which may be causing the issue.