How do I fix the problem of missing or disappeared emails in my Outlook account after updating the software?

1. Check your system’s memory and run this scan.
2. Check your network connection. Make sure you are not behind a firewall that is blocking your traffic.
3. Install the latest updates for the operating system.
4. Check the Outlook Client configuration.
5. Check the mail server settings.
6. Clear the cache in your browser.
7. Disable user-specific settings in Outlook.
8. Clear the Outlook Data File.
9. Run an Antivirus scan.