Hello Caroline,
Thank you for interacting with us by posting your issue on this forum.
We can try with these troubleshooting which may fix the issue for you:
- Check Network Restrictions – Office firewall/security settings may block outside submissions.
- Try Different Browsers or Clear Cache.
- Review Form Permissions – Ensure external submissions are allowed.
- Try submitting the pre-filled form without changes.
- Verify Required Fields or Conditional Logic – Ensure no missing mandatory fields.
- Use Incognito Mode or Another Account – See if login/session issues are causing the problem.
Hope this helps! Have a nice day!
Regards,
Zenitsu | Microsoft Community Moderator