App has reached it sign-in rate limit

Wait and retry later; Google Error 403 rate_limit_exceeded indicates that Google has temporarily capped how quickly the Microsoft-owned application can authorize new users, and only the application owner can request a quota increase.

What to do

1. Stop the current account-addition flow and retry later.
   No documented reset interval is available, so a specific waiting period cannot be guaranteed.
2. When retrying, complete the Google authorization once.
   Sign in to the intended Google account and select Allow when Google asks whether Microsoft apps and services may access it.
3. If the same error continues, contact Microsoft Support.
   Open the Microsoft Support contact page, enter the problem, select Get Help, and then choose Contact Support if offered.^1^
   Include:
   • The exact error: 403: rate_limit_exceeded
   • The Microsoft application and platform involved
   • Whether this happened while adding a new Gmail/Google Workspace account
   • A screenshot with email addresses and other personal information hidden
   • The approximate date and time of the failure
   The developer address displayed by Google may also be an escalation route, but verify that it appears directly on the live Google authorization page before using it, and do not send passwords, verification codes, or other sensitive account information.

If this occurred in new Outlook for Windows

After waiting, retry through:

1. Outlook → View → View settings
   Alternatively, select File → Account info.
2. Select Accounts → Your accounts → Add account.
3. Enter the Gmail address and select Continue.
4. Complete Google sign-in and select Allow.
5. Confirm that Outlook reports the account was added successfully.^2^

These Outlook steps apply only if the error appeared while adding Gmail to new Outlook for Windows. The affected application and platform are needed to provide the correct client-specific path if it occurred elsewhere.

This is different from Google’s disallowed_useragent Error 403 in Outlook for Android, which has a separate Chrome/default-browser remedy; that workaround should not be applied to rate_limit_exceeded.^3^

References

1. Link your Google account and Microsoft account | Microsoft Support
2. Add a Gmail account to Outlook for Windows | Microsoft Support
3. I see Error 403, or disallowed_useragent and a Google error. What's up? | Microsoft Support