Using Classic Outlook on Windows for personal email, calendar, and contact management
Contact Microsoft technical support through the Get Help option and request an agent for classic Outlook for Windows → adding a Gmail account.^1^
Talk to a support agent
- Open the Microsoft Support contact page.
- Select Get Help under Microsoft technical support.
- Sign in with the Microsoft account associated with Microsoft 365 or Office.
- Enter: Classic Outlook continuously loops while adding Gmail account.
- Continue to Contact Support and select the available contact method, which may include browser chat. Available support options depend on the product and subscription.^1^
- Give the agent:
- Your Outlook version and build from File → Office Account → About Outlook
- The exact message displayed during the loop
- Whether Google’s permissions page appears
- Whether this affects one or every Gmail account
If you have Microsoft 365 for home or a qualifying one-time Office purchase, the classic Outlook support page also provides a Contact Us option under Need more help?^2^
If you want to try the documented fix first
If the loop reaches Google’s authorization page, ensure that the permission allowing Microsoft apps & services to read, compose, send, and permanently delete Gmail messages is selected. Missing that permission is a documented cause of Gmail setup failures in classic Outlook.^3^
For Current Channel Version 2412 Build 18324.20168 or later:
- On Outlook’s error window, select Retry.
- Complete the browser sign-in again.
- On Google’s permissions page, select the permission for Microsoft apps & services.
- Select Allow and let Outlook finish adding the account.
If that fixed-build retry still loops, Microsoft’s manual workaround is:
- Close Outlook.
- In your Google Account, open Security → Your connections to third-party apps & services → Microsoft apps & services → See Details.
- Select Remove all access, then confirm.
- In Windows, search for and open Credential Manager.
- Select Windows Credentials → Generic credentials.
- Remove the two credentials for the affected Gmail account whose names begin with
MicrosoftOffice16_Data:OAUTH2and includetp_google_imap_Oauth2. - Reopen Outlook and select File → Add Account.
- Complete browser sign-in and select the required Microsoft apps & services permission.^3^
Removing those credentials signs the affected Gmail connection out; avoid deleting unrelated saved credentials.
References