Send/Receive failure in Classic Outlook

Check Microsoft’s service-health page first because a current Microsoft/Outlook incident could account for the sudden Gmail send/receive failure; Microsoft has not published a firm restoration time, so the incident status is the best available prognosis.^1^

Determine whether to wait or troubleshoot

1. Open Microsoft service health status and review the active incident and updates.^1^
2. Sign in directly to Gmail in a browser:
   • If Gmail sends and receives there, your messages and Gmail mailbox are working; use Gmail on the web while Outlook service recovers.
   • If Gmail also fails in the browser, check Google’s service dashboard.^2^
3. In Classic Outlook, inspect the status bar:
   • If it says Working Offline, select Send/Receive → Work Offline once to return online.
   • Disconnected or Trying to connect indicates that Outlook is not reaching the mail server.^3^

If Gmail works online and Microsoft still lists an active incident, avoid deleting and recreating the Outlook account for now. Wait for the incident to be marked resolved, restart Outlook, and test Send/Receive All Folders.

If the incident is resolved but Gmail still does not synchronize

Record the exact message from Send/Receive → Show Progress → Errors.

If the error is 0x800CCC0E, 0x800CCC0F, or 0x80070057, Microsoft documented a Gmail OAuth credential problem with the same send/receive symptoms. That incident was fixed on March 20, 2026, but stale credentials can still prevent Outlook from prompting for a new Google sign-in.^4^

That detailed workaround is explicitly listed as applying to Outlook for Microsoft 365, not perpetual Outlook 2024. If your File → Office Account → Product Information says Microsoft 365, use it:

1. Close Outlook.
2. Search Windows for Credential Manager.
3. Select Windows Credentials.
4. Under Generic Credentials, locate entries beginning with MicrosoftOffice16_Data:OAUTH2.
5. Expand them and identify entries containing tp_google_imap_Oauth2.
6. Remove all such credentials belonging to the affected Gmail account.
7. Start Outlook and complete the Google browser sign-in.
8. If synchronization does not begin, restart Outlook once more.^4^

For a perpetual Office Home & Business 2024 installation, do not apply the registry fallback from that Microsoft 365 notice without confirmation from Microsoft Support. Instead, use the exact error code and build number from File → Office Account → About Outlook when requesting support.

If Outlook instead displays a Google permission or account-setup error, repeat the Google browser authorization and grant the requested permission to read, compose, send, and delete Gmail. Microsoft documents the Retry flow for supported builds.^5^

References

1. Microsoft service health status
2. Google Workspace Status Dashboard
3. I can't send or receive messages in Outlook | Microsoft Support
4. Users get errors 0x800CCC0E & 0x800CCC0F synchronizing Gmail and Yahoo accounts in classic Outlook | Microsoft Support
5. Unable to add a Gmail account to classic Outlook | Microsoft Support