Outlook suddenly stopped sending email from my Gmail account

Question

Outlook suddenly stopped sending email from my Gmail account

Brent Ford 5

I had an email that would not send from my Gmail account in Outlook. I did all of the troubleshooting with my settings in IMAP to get it to go. Finally, I tried to just delete that account from Outlook and re-add it. Now, I can't even get it to add back in at all. I keep getting an "We weren't able to set up your Google account with IMAP. You may need to make changes to your Gmail settings". I have logged into Google and made sure IMAP was turned on, which it is. I don't know what else to do!!

Gabe Bratton 636 Reputation points Microsoft Employee Moderator

2026-03-09T20:08:28.07+00:00

@brent ford We just posted a Known Issue for this problem, https://support.microsoft.com/en-us/topic/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67. Please try the workaround and then retry adding your Gmail account.

2 answers

Your answer

Gabe Bratton 636 Reputation points Microsoft Employee Moderator

2026-03-09T20:08:28.07+00:00

@brent ford We just posted a Known Issue for this problem, https://support.microsoft.com/en-us/topic/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67. Please try the workaround and then retry adding your Gmail account.

Answer 1

Kal-D 4,710 Microsoft External Staff Moderator

Hi Brent Ford,

Welcome to Microsoft Q&A.

It sounds like this may be related to a Google OAuth sign‑in or permission issue between Classic Outlook for Windows and Gmail, which can occur if the Google authorization flow doesn’t complete correctly.

Since you’ve already confirmed that IMAP is enabled in Gmail, please try the steps below to refresh the connection:

1. Clear old Outlook credentials (if present)

Close Outlook. Open Windows Credential Manager > Windows Credentials.

Under Generic Credentials, remove any entries starting with: MicrosoftOffice16_Data:OAUTH2 that reference Google.

User's image

2. Remove Outlook’s access from your Google account

Sign in to Gmail using a web browser.

Go to Google Account > Security > Third‑party apps with account access, locate Microsoft apps & services, and select Remove Access.

3. Add the Gmail account again and confirm all permissions

Open Outlook and go to File > Add Account.

When the Google sign‑in page appears, expand the permissions and make sure the option allowing Outlook to “Read, compose, send, and permanently delete all your email from Gmail” is checked. If this permission isn’t granted, the IMAP setup can fail.

Tip: If Outlook shows an error window with a Retry link, select Retry. This often reopens the correct Google sign‑in page and allows the permissions to be confirmed properly.

Microsoft has also documented this behavior and the same remediation steps in the following support article, in case you’d like to reference it: Unable to add a Gmail account to classic Outlook

Please let me know if this proves useful to you, or if you would like further assistance.

I'm looking forward to your reply.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Kal-D 4,710 Reputation points Microsoft External Staff Moderator

2026-03-11T22:15:36.6066667+00:00

Hi Brent Ford,

I am writing to see how things are going with this issue.

If there’s anything else I can assist you with or if you need further clarification, please don’t hesitate to let me know, I’m here to help.

Looking forward to hearing from you.
Annette Kowatch 0 Reputation points

2026-03-11T22:45:14.7466667+00:00

I have the same issue and I tried the work around with no luck. Is there anything else you can suggest?
Gabe Bratton 636 Reputation points Microsoft Employee Moderator

2026-03-12T13:02:08.47+00:00

@Annette Kowatch try the workaround in this article, 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. After you do the workaround restart Outlook. Also, double check when you sign in to Gmail that you also check the box to all access to Microsoft Apps and Services. If you already did this then you won't see it again, but I see this get missed a lot.
Annette Kowatch 0 Reputation points

2026-03-12T14:12:06.67+00:00

Thanks I have done all of this and multiple times.......still not working. I did give in and started using the new outlook just for my gmail and tried to toggle back to the classic version and had the same issue with it stopping to sync my gmail.
Gabe Bratton 636 Reputation points Microsoft Employee Moderator

2026-03-12T14:32:47.8633333+00:00

After you do the steps in the article make sure you restart classic Outlook. Once you see the Yellow Sign In business bar at the top of the Outlook screen goes away it will start syncing. Make sure you are using your regular password to sign in. You do not need an App Password.

It should not be necessary but if nothing else works try creating a new Outlook profile, https://support.microsoft.com/en-us/office/create-an-outlook-profile-f544c1ba-3352-4b3b-be0b-8d42a540459d.
Brent Ford 5 Reputation points

2026-03-12T15:10:08.89+00:00

Thanks for the feedback. I tried all of the above to no effect. However, by switching to New Outlook, everything came online.
Kal-D 4,710 Reputation points Microsoft External Staff Moderator

2026-03-12T21:42:55.5266667+00:00

Hi Annette Kowatch and Brent Ford,

I know you’ve already tried quite a lot, including the steps Gabe suggested, so I appreciate you sticking with it and sharing clear results. Since the behavior persists despite all of that and everything works normally once you switch to New Outlook, it’s clear you haven’t missed anything or done anything wrong.

At this point, moving to New Outlook is the only option that’s consistently working. Thanks as well to Gabe for helping narrow things down, and to both of you for helping bring clarity to the thread.

Answer 2

Follow these steps in order, based on the known Gmail–Outlook issues:

Confirm IMAP is enabled in Gmail
In a browser:
1. Go to Gmail.
2. Select Settings (gear) > See all settings.
3. Open the Forwarding and POP/IMAP tab.
4. Under IMAP access, make sure Enable IMAP is selected.
5. Select Save Changes.
Ensure Gmail folders are exposed to IMAP
Still in Gmail settings:
1. Open the Labels tab.
2. For Inbox, Sent Mail, Trash, All Mail (and any other labels that should appear in Outlook), make sure Show in IMAP is selected.
Re-add the Gmail account in classic Outlook using the fixed flow
There is a known issue in classic Outlook where adding a Gmail account fails with:

“We weren’t able to set up your Google account with IMAP. You may need to make changes to your Gmail settings.”

This happens if, during the Google sign-in window, the required permission was not granted. Outlook needs the following Google consent option checked:

Select what Microsoft apps & services can access: “Read, compose, send, and permanently delete all your email from Gmail.”

Do the following:
1. Make sure Outlook is updated to Current Channel Version 2412 Build 18324.20168 or later (the build where this issue is fixed).
2. Add the Gmail account again from File > Add Account.
3. When the Google sign-in/consent page appears, expand the permissions and ensure the option for “Read, compose, send, and permanently delete all your email from Gmail” is checked.
4. If the add fails and Outlook shows an error window with a Retry link, select Retry to repeat the browser sign-in and this time check that permission box.
If still failing after updating and retrying
Use the manual Gmail-side configuration as a cross-check:
1. Confirm again that IMAP is enabled (Step 1) and folders are set to Show in IMAP (Step 2).
2. Verify that no security or app access setting in Google is blocking third‑party email clients.
3. Then attempt the Outlook add-account flow again, making sure the Gmail consent permission is granted as described above.

These steps address both Gmail-side IMAP configuration and the specific Outlook–Gmail consent issue that produces the “We weren’t able to set up your Google account with IMAP” error.

References:

Brent Ford 5 Reputation points

2026-03-08T14:15:15.0233333+00:00

When the Google sign-in/consent page appears, expand the permissions and ensure the option for “Read, compose, send, and permanently delete all your email from Gmail” is checked.

That does not appear. I am simply inputting the email address that I want to add. I am not getting a request to insert my password.

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Outlook suddenly stopped sending email from my Gmail account

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