Outlook Error Codes

How to Fix Outlook Error 0x800CCC0E When Synchronizing Folders

Ayan Masood Oct 22, 2026 868 views

Question details

The user is unable to synchronize subscribed email folders due to a mail server connection failure in Outlook.

How to Fix Outlook Error 0x800CCC0E When Synchronizing Folders

Product: Microsoft Outlook
Device & OS: not provided
Scenario: Attempting to synchronize folders across one or multiple ISP email accounts.
Observed behavior: Outlook displays error code 0x800CCC0E and fails to connect to the mail server, even though webmail and the internet connection are functioning correctly.

Before you start

Verify that your internet connection is active and ensure you have your ISP's required incoming and outgoing server settings (including port numbers and encryption methods) ready for reference.

Solution 1Recommended

Create a New Outlook Profile to Test the Connection

Creating a fresh Outlook profile helps determine if the error is caused by a corrupted profile rather than actual server issues.

A corrupted Outlook profile is a common cause of synchronization errors. By setting up a new profile with a single account, you can isolate the issue without risking your existing data.

Open the Mail Control Panel

Close Microsoft Outlook completely. Open the Windows Control Panel, change the view to Large Icons, and click on 'Mail (Microsoft Outlook)'.

Add a New Profile

Click the 'Show Profiles' button, then click 'Add' to create a new profile. Assign a recognizable name to this new profile and click 'OK'.

Configure the Email Account

Enter your email address, password, and account details. Follow the on-screen prompts to let Outlook automatically configure the account, or choose manual setup if required by your ISP.

Test the New Profile

In the Mail dialog box, select 'Always use this profile' and choose your newly created profile from the drop-down menu. Restart Outlook and check if the folders synchronize without error.

Preserve Existing Data: Do not delete your old Outlook profile or any data files until you have fully verified that the new profile resolves the synchronization issue.

Solution 2

Verify Server Settings and Temporarily Disable Antivirus

Incorrect port numbers, missing authentication, or aggressive antivirus email scanning can block Outlook from communicating with the mail server.

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Frequently Asked Questions

Why does error 0x800CCC0E occur in Outlook but not on my webmail?

Webmail accesses your email directly through a browser, bypassing local network and application settings. Outlook relies on specific protocols (IMAP/POP/SMTP) and ports. If these ports are blocked by a firewall, antivirus, or if the profile is corrupt, the error will only appear in Outlook.

What are the correct port settings to prevent Outlook synchronization errors?

While settings vary depending on your ISP, standard secure ports are typically 993 for IMAP (Incoming) using SSL/TLS, and 465 or 587 for SMTP (Outgoing) using SSL/TLS or STARTTLS.

Will creating a new Outlook profile delete my existing emails?

No, creating a new profile does not delete your old emails. Your previous profile and its associated data files (.pst or .ost) remain untouched on your computer until you manually choose to remove them.

What should I do if the error persists across all email accounts?

If the error affects every account configured in Outlook, the issue is likely network-wide. Check your firewall settings, try restarting your router, or contact your ISP to confirm there are no temporary server outages blocking IMAP or SMTP traffic.

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