Outlook classic cannot synchronize subscribed folders

The error 0x800CCC0E when synchronizing subscribed folders for a Gmail account in classic Outlook is a known issue related to how the Gmail account is added and authenticated in Outlook.

Use these steps to resolve it:

1. Confirm Outlook build and use the Retry flow (if available)
   • Make sure classic Outlook is updated to at least Current Channel Version 2412 Build 18324.20168.
   • When the error appears, look for a Retry link in the error window.
   • Select Retry and, in the browser sign-in for Gmail, ensure the permission box is checked:
     • Select what Microsoft apps & services can access: "Read, compose, send, and permanently delete all your email from Gmail."
   • Complete the sign-in and let Outlook resync the Gmail folders.
2. If the Retry solution is not available or does not work
   • Remove the problematic Gmail account from the Outlook profile.
   • Re-add the Gmail account so that the browser sign-in appears again.
   • During sign-in, explicitly check the permission for Microsoft apps & services to Read, compose, send, and permanently delete all your email from Gmail.
   • Finish setup and then run Send/Receive to verify that subscribed folders now synchronize without 0x800CCC0E.
3. If Outlook never prompts for a password or browser sign-in
   • When configuring Gmail as IMAP manually, on the IMAP details page ensure Require logon using Secure Password Authentication (SPA) is unchecked.
   • If still not prompted correctly:
     1. Open Control Panel → Mail.
     2. Select Email Accounts… → New.
     3. Enter name, Gmail address, and password, then select Next and follow the prompts until setup completes.
   • This forces a clean account configuration that uses the correct authentication flow.
4. If the error persists across multiple accounts
   • The error 0x800CCC0E is also listed among general send/receive connection errors in Outlook. After fixing the Gmail permission and re-adding the account, if the error still appears, run through the general troubleshooting in the “I can’t send or receive messages in Outlook” guidance, including checking connectivity and account configuration.

After these steps, Outlook should be able to connect to Gmail’s IMAP server and synchronize subscribed folders without the 0x800CCC0E error.

References:

• Unable to add a Gmail account to classic Outlook
• Unable to sign in or add a Gmail account to classic Outlook
• Troubleshoot Outlook email setup
• I can't send or receive messages in Outlook