I cannot add gmail account to outlook office 2024

Question

I cannot add my gmail account to newly installed outlook classic in Office 2024

Answer 1

@Daniel Sooley said

I tired all the patches and nothing worked

In addition to the workaround suggested by DaveM121 there is another workaround that seems to be effective for some people.

See the "Clear Windows Credentials Workaround" section of the Answer by "Hornblower409 Mar 15, 2026, 4:15 PM" at
https://learn.microsoft.com/en-us/answers/questions/5822942/imap-email-server-connection-error

And if that doesn't work, then there is the "Start from Scratch" process:

1 -- Classic Outlook - Export any data for the GMail account that you have stored only locally in "This Computer Only" folders. Since the OST file it is stored in will be useless once you remove the account.

https://support.microsoft.com/en-us/office/export-emails-contacts-and-calendar-items-to-outlook-using-a-pst-file-14252b52-3075-4e9b-be4e-ff9ef1068f91

2 -- Classic Outlook - Remove the GMail account from your Profile.

https://support.microsoft.com/en-us/office/remove-or-delete-an-email-account-from-classic-outlook-for-windows-1fa900ae-6dc8-468c-b754-10292f7ee47a

3 -- Classic Outlook - Exit

4 -- Google - Remove Microsoft Access

"Manual Workaround - Step 1" in

https://support.microsoft.com/en-us/office/unable-to-add-a-gmail-account-to-classic-outlook-4d9530c5-3f40-4e6d-9b45-4477f160828f

5 -- Windows - Delete Windows Credentials

"Manual Workaround - Step 2" in

https://support.microsoft.com/en-us/office/unable-to-add-a-gmail-account-to-classic-outlook-4d9530c5-3f40-4e6d-9b45-4477f160828f

Many people report that they can't locate just the GMail credentials, and remove any credentials that start with MicrosoftOffice16_Data:OAUTH2

6 -- Classic Outlook - Start the whole "Add a GMail Account" process from scratch.

https://support.microsoft.com/en-us/office/add-a-gmail-account-to-outlook-for-windows-70191667-9c52-4581-990e-e30318c2c081#picktab=classic_outlook

On the Google access permissions screen, be sure you tick the checkbox "Read, compose, send, and permanently delete all your email from Gmail." on the top right.

If that doesn't do it for you, then you may not be facing the same problem as described in the Microsoft Support articles. (Hey. This is Outlook. There are lots of different ways it can go sideways).

Your next step would be to bring in Microsoft Support so they can examine your client.

MS 365 Subscriber Support
https://www.microsoft.com/en-us/microsoft-365/support

Free Chat Support

• Open a browser to https://support.microsoft.com/en-us/home/contact
• Tell us your problem: "Classic Outlook GMail Connection"
• [Get Help] {Scroll down to the bottom of the page} [Sign in to Contact Support]
• Sign in with any Microsoft account
• Products and services: "Microsoft 365 and Office"
• Category: "Outlook"
• [Confirm]
• Choose a support option -> "Chat with a support agent in your web browser"

Answer 2

This issue has been widely reported, and Microsoft is currently working on a fix and plan to release the patch as soon as possible.

In the meantime, if you are experiencing this issue with Outlook Classic, try accessing your Gmail account using the web browser version of Outlook.

Also, until a patch is released for the Outlook Gmail account issue, please check out the solutions provided by Microsoft via this link.

https://support.microsoft.com/en-us/office/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67

Answer 3

Follow these steps that address the current Gmail/Outlook Classic issues.

1. Confirm Outlook is on a fixed build
   • In Outlook Classic, go to File > Office Account.
   • Check the Version and Build.
   • For Gmail sign-in issues, the fixes are available starting with:
     • Sign-in fix: Version 2404 (Build 17531.10000) or later.
     • Gmail permission fix: Current Channel Version 2412 Build 18324.20168 or later.
   • If the build is older, select Update Options > Update Now and update Office, then retry adding the Gmail account.
2. Retry Gmail sign-in and grant full permissions
   • When adding the Gmail account in Outlook Classic, a browser window opens for Google sign-in.
   • On the Google permissions page, ensure the option is checked for:
     • “Read, compose, send, and permanently delete all your email from Gmail.” under Microsoft apps & services can access.
   • Complete sign-in and finish the account setup.
   • If Outlook shows an error window with a Retry link and the build is 2412/18324.20168 or later, select Retry to repeat browser sign-in and this time check that permission box.
3. If errors persist, apply the manual workaround A. Remove Microsoft access in Google
   1. Close Outlook.
   2. Sign in to the Gmail/Google account at google.com.
   3. Select the profile picture > Manage your Google Account.
   4. Go to Security.
   5. Scroll to Your connections to third-party apps & services and select Microsoft apps & services.
   6. Select See Details for Microsoft apps & services has some access to your Google Account.
   7. Under Access you've given to Microsoft apps & services, select Remove all access.
   8. Confirm.
   B. Clear stored Google IMAP credentials in Windows
   1. Open Credential Manager from the Start menu (in Windows 10, open Control Panel first, then Credential Manager).
   2. Select Windows Credentials.
   3. Under Generic Credentials, find entries starting with MicrosoftOffice16_Data:OAUTH2.
   4. Expand each and hover over the name until tp_google_imap_Oauth2 appears in the full name – these are the Gmail credentials.
   5. Select Remove for each credential that includes MicrosoftOffice16_Data:OAUTH2 with tp_google_imap_Oauth2. There are two per Gmail account; remove both.
   6. (Optional) To target only one Gmail account, map credentials using the identities under the registry path:
      • Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity\Identities
   C. Re-add the Gmail account in Outlook Classic
   • Restart Outlook Classic and add the Gmail account again.
   • When the Google sign-in window appears, sign in and ensure the Gmail permission “Read, compose, send, and permanently delete all your email from Gmail.” is selected.
4. If seeing “browser or app may not be secure” or IMAP errors
   • Ensure Outlook is on a build that includes the sign-in fix (Version 2404 Build 17531.10000 or later as listed above) and update if needed.
   • If the error mentions IMAP, verify IMAP is enabled for the Gmail account as described in Google’s Add Gmail to another email client guidance.

After these steps, Outlook Classic should be able to authenticate to Gmail and complete account setup.

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References:

• Unable to add a Gmail account to classic Outlook
• Add a Gmail account to Outlook for Windows
• Unable to sign in or add a Gmail account to classic Outlook