How do I troubleshoot the issue of Outlook not properly saving or syncing my tasks or to-do list?

1. Check your Outlook account settings: Open Outlook and navigate to 'Account Settings' in the left navigation bar. Check if your account settings are intact. This includes your email address, password, account type, server type, etc.
2. Verify your internet connectivity: Make sure your device is connected to the internet. Restart your device or router if needed, and then re-open Outlook to check if the issue has been resolved.
3. Check the status of Outlook sync services: Check to see if the Outlook synchronization service is active and functioning as needed. This can usually be done within the Settings menu of the app itself.
4. Run a system scan: If you continue to experience sync issues, it's possible that one or more viruses or malicious applications are running in the background and causing the problem. Run a virus scan to make sure this isn't the issue.
5. Try restarting Outlook: Close Outlook, wait 30 seconds, and then restart Outlook. Check again to see if the task list has synced properly.