error 0x800CCC1A

Question

I am receiving an error message when opening Outlook 365. Outlook will send/received if I restart (and I've restarted dozens of times today) but not if work on my computer for awhile.

Answer 1

The error code 0x800CCC1A in Outlook typically indicates a problem with the connection to the mail server. This can happen for several reasons, including:

1. Network Connectivity: Ensure that your internet connection is stable and that there are no interruptions.
2. Firewall or Antivirus Software: Sometimes, firewall or antivirus software can block Outlook from connecting to the mail server. Check your settings to ensure that Outlook is allowed to connect.
3. Incorrect Account Settings: Verify that your email account settings (like incoming and outgoing server settings) are correct. You can do this by going to the account settings in Outlook.
4. Outdated Outlook Version: Make sure that you have the latest updates installed for Outlook. Sometimes, bugs in older versions can cause connectivity issues.
5. Corrupted Outlook Profile: If the issue persists, your Outlook profile might be corrupted. You can try creating a new profile to see if that resolves the issue.
6. Add-ins Interference: Disable any add-ins that might be interfering with Outlook's operation. You can do this by starting Outlook in safe mode (hold down the Ctrl key while starting Outlook) and see if the error occurs.

If you continue to experience issues, consider using the Classic Outlook Advanced Diagnostics troubleshooter to check for common problems automatically.

---

References:

• Outlook not responding error or Outlook freezes when you open a file or send mail
• Outlook not responding error or Outlook freezes when you open a file or send mail
• How can I get office 365 to work? - Microsoft Q&A