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...



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Leon Pavesic
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(Twitter)

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/