Error in Microsoft Outlook
Error in Microsoft Outlook
Reinstalling Office or Outlook appears to be the simplest approach to consider.
If an exchange server is in play, you must reach out to the person managing it. For a personal account, Microsoft support would be advisable.
You might notice the issue when the .ost file is damaged too. Removing it and starting again will prompt Outlook to rebuild it.
You can reinstall or uninstall Outlook just the application itself.