I'm unable to connect my Google Workspace email account to Outlook for Windows.

José Artur Alves 0 Reputation points
2026-11-13T08:39:15.3966667+00:00

Hello,

I'm unable to connect my Google Workspace email account to Outlook for Windows.

Google displays the following error:

Error 403: rate_limit_exceeded

"This app has reached its sign-in rate limit for now. Google limits how quickly an app can get new users."

The error identifies [email protected] as the developer contact.

My Gmail works correctly in Google Chrome, but I cannot access it through Outlook.

Could you please escalate this to the Outlook authentication team and advise when the issue will be resolved?

Thank you.

Outlook | Windows | Classic Outlook for Windows | For home
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  1. AI answer

    2026-11-13T08:39:31.4533333+00:00

    This issue is not covered by the available support content as an Outlook escalation path or ETA request.

    Supported checks and fixes for Outlook for Windows with Google Workspace or Gmail are:

    1. Make sure Outlook is updated to a build that includes Google sign-in fixes.
      • For classic Outlook, a fix for Google sign-in opening in a separate browser window is available in:
        • Beta Channel: Version 2404 (Build 17531.10000)
        • Current Channel Preview: Version 2404 (Build 17531.10000)
        • Current Channel: Version 2404 (Build 17531.10000)
        • Monthly Enterprise Channel: Version 2407 (Build 17727.10000)
    2. Verify IMAP is enabled in the Google account.
      • In Gmail: Settings > Forwarding and POP/IMAP > Enable IMAP > Save Changes.
    3. If Outlook reports that it cannot set up the Google account with IMAP, confirm the mail settings:
      • Incoming IMAP server: imap.gmail.com, SSL, port 993
      • Outgoing SMTP server: smtp.gmail.com, SSL port 465, or TLS/STARTTLS port 587
      • Authentication required: Yes
      • Username: full email address
    4. If classic Outlook shows browser-related Google sign-in errors, use the documented workarounds that match the symptom:
      • “The browser or app may not be secure” or “We weren’t able to set up your Google account with IMAP”: update Outlook to the fixed build.
      • “Could not sign you in to Google - IMAP”: in an Office app go to File > Office Account > under Account Privacy select Manage Settings > enable Enable optional connected experiences, then restart Outlook.
      • Allow button grayed out: restart Windows, or temporarily change the default browser and try adding the account again.
      • “This web browser does not support JavaScript or scripts are being blocked”: a registry workaround exists. Warning: incorrect registry changes can cause serious problems.
    5. If the account previously worked and then stopped syncing in classic Outlook, remove stale Outlook OAuth credentials to force a new sign-in prompt:
      • Close Outlook.
      • Open Credential Manager.
      • Go to Windows Credentials.
      • Under Generic credentials, locate entries starting with MicrosoftOffice16_Data:OAUTH2.

    The specific Google error 403: rate_limit_exceeded and the request to escalate to the Outlook authentication team are not addressed in the available documentation.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. DaveM121 948.5K Reputation points Independent Advisor
    2026-11-13T09:11:41.41+00:00

    Hi José,

    There is currently a world-wide outage affecting some Microsoft services, including Outlook, Hotmail, Microsoft 365, Copilot, OneDrive... etc. It is a server-side issue that Microsoft indicate they are working to correct.

    You can monitor their progress on this link https://status.cloud.microsoft/ or on the Microsoft Twitter page: https://x.com/MSFT365Status/status/2120938282204688468

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