Outlook error code 0x800CCC0E

Question

My Outlook stopped sending and receiving emails. Outlook error code 0x800CCC0E

Answer 1

Dear @Bradie Scholz,

Based on my research, it appears that other users have recently reported experiencing the same behavior, and this issue is currently under investigation by Microsoft in certain environments. You can refer to the following Microsoft Support article for details: Users get errors 0x800CCC0E & 0x800CCC0F synchronizing Gmail and Yahoo accounts in classic Outlook

At the moment, you may try the following workaround steps, which have helped some users in similar situations:

Important: The steps below involve editing the Windows Registry. Please proceed carefully, and consider backing up the registry or creating a restore point before making changes.

1. Right click the Windows Start Button, select Run, type Regedit and select OK.
2. Paste the path below in the Regedit Address Bar and press Enter. Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity\Identities
3. Under the Identities key, select each sub key until you find the one that matches the email address that is not syncing.
4. Delete the Identities registry key, example in red below. Look for the corresponding Gmail or Yahoo email address, example in purple. That is the identity key in the left column to delete. After you delete the key, restart Outlook and sign in again.

I hope this workaround helps. Please try the steps above and let me know how it goes. Since this forum does not have access to your mailbox or server configuration, we can only provide guidance based on official documentation and community reports.

If Microsoft releases a confirmed fix or update, I’ll be happy to share it here. Please let me know if you need anything else. Have a wonderful day.

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Answer 2

@Vincent Chen said

[this method] doesn't work for me

There are multiple workarounds from Microsoft for the current problems with Classic Outlook and IMAP/POP Accounts (e.g. GMail, Yahoo) in addition to the one provided in this thread.

Short Version - See the Answer by "Hornblower409 Mar 15, 2026, 4:15 PM" at
https://learn.microsoft.com/en-us/answers/questions/5822942/imap-email-server-connection-error

Full Nine Yards - See the answer by "Hornblower409 Mar 19, 2026, 12:37 AM" at
https://learn.microsoft.com/en-us/answers/questions/5827459/i-cannot-add-gmail-account-to-outlook-office-2024

Answer 3

Error 0x800CCC0E in classic Outlook indicates a problem connecting to the mail server. Use the following steps to troubleshoot in classic Outlook for Windows:

1. Check for known Outlook issues
   • Error 0x800CCC0E is listed among connection-related errors that can prevent sending/receiving mail. Review current Outlook known issues, especially if using Gmail or Yahoo accounts, as there is an active investigation for 0x800CCC0E/0x800CCC0F sync problems.
2. Verify password and account settings
   • If the email account password was recently changed on the provider’s website, update the same password in classic Outlook. If the password in Outlook is outdated, Outlook will fail to connect and can show connection errors like 0x800CCC0E.
3. Check antivirus integration
   • Some antivirus products scan email and can block or interrupt the connection to POP/IMAP/SMTP servers, causing send/receive failures.
   • Temporarily disable Outlook integration or email scanning in the antivirus (not the entire antivirus engine) and test send/receive again.
   • If this resolves the issue, work with the antivirus vendor to configure exclusions for Outlook rather than leaving scanning disabled. Be aware that changing antivirus settings can increase exposure to malicious content.
4. Repair Outlook and the Outlook profile
   • Repair the Outlook/Office installation if the program itself is damaged:
     • Use the Office “Repair an Office application” process, then restart Outlook and test.
   • Repair or recreate the Outlook profile if the profile is corrupted:
     • Use the steps in “Fix your Outlook email connection by repairing your profile” to repair the existing profile.
     • If problems persist, create a new Outlook profile and configure the account again.
5. Start Outlook in Safe Mode
   • Some add-ins can interfere with the mail connection and cause send/receive errors.
   • Start Outlook in safe mode by pressing the Windows key, typing outlook.exe /safe, and pressing Enter.
   • If send/receive works in safe mode, disable or remove problematic add-ins and/or use a fresh profile.
6. Check for TLS/connection issues (POP/IMAP)
   • If using POP or IMAP and the server connection is unexpectedly terminated or interrupted, review TLS configuration on the Windows machine.
   • If TLS 1.3 is present under the system’s Protocols registry key, export that key for backup, then remove the TLS 1.3 key and subkeys, restart Outlook (and Windows if needed), and test sync again. This can resolve cases where Outlook cannot maintain a secure connection to the mail server.
7. Repair Outlook data files (.pst/.ost) if applicable
   • If the account uses a local .pst file, corruption can also cause send/receive failures.
   • Run the Inbox Repair Tool (ScanPST) to repair the .pst file as described in “Repair your Outlook personal folders file (.pst)”. After repair, restart Outlook and test.

If, after these steps, 0x800CCC0E persists only for specific providers (such as Gmail or Yahoo), check the current “Users get errors 0x800CCC0E & 0x800CCC0F synchronizing Gmail and Yahoo accounts in classic Outlook” known-issues article for provider-specific guidance or workarounds.

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References:

• I can't send or receive messages in Outlook
• Outlook not responding error or Outlook freezes when you open a file or send mail
• Outlook IMAP or POP server unexpectedly terminated the connection, and the server was interrupted
• Fixes or workarounds for recent issues in classic Outlook for Windows