0x800CCC0F error in outlook2016 win10 ,how to solve this problem ?

Occasional Reader
2 Replies

Hi @jiangzhaoyan1227,

here are the steps you can use:

  1. Verify Your Internet Connection: Ensure your internet connection is stable.

  2. Disable Antivirus Software: Temporary disable any antivirus software that may interfere with Outlook's email operations.

  3. Turn Off Windows Firewall: Disable the Windows Firewall temporarily to check if it's causing the issue.

  4. Adjust Server Timeouts in Outlook: Increasing server timeout settings within Outlook could help resolve the problem.

  5. Use Outlook Safe Mode: Running Outlook in safe mode can help identify if any add-ins are causing the error.

  6. Repair Outlook PST Files: If previous steps don't resolve the issue, consider repairing your Outlook PST files.

More detailed instructions you can find here:
Error occurs when you send or receive an email message in Outlook or Outlook Express - Microsoft Sup...

Please click Mark as Best Response & Like if my post helped you to solve your issue.
This will help others to find the correct solution easily. It also closes the item.

If the post was useful in other ways, please consider giving it Like.

Kindest regards,

Leon Pavesic

Hi, the 0x800CCC0F error generally occurs due to various reasons like unstable Internet connection issues, Antivirus or firewall interference, Server timeouts, Add-in conflicts/corruptions, Corrupt or damaged PST files. If you have tried all these and not helped there is a high possibility that your PST file is corrupted and you can repair your PST file by using a PST repair tool. To know more about the tool check here: https://windowsreport.com/stellar-repair-for-outlook/