Key Takeaways
- Confirm One-Way Sync: New Outlook for Windows can still receive Gmail while moves, deletions, archives, or read status changes fail to reach Gmail through the Microsoft Cloud. Move one test email in Outlook and another in Gmail on the web, then check both results.
- Reconnect Your Gmail: Revoke Microsoft apps & services access in your Google Account, remove Gmail from new Outlook on this device only, then add Gmail back and select Allow. If changes still fail, try Repair then Reset, check Show in IMAP for Gmail labels, and update Outlook.
- Report Failed Sync: If new Outlook for Windows still won’t sync Gmail changes, use Help, Feedback, then Report a problem, and manage your mail in Gmail on the web or classic Outlook. Microsoft hasn’t listed one-way Gmail sync as a known issue.
If you’re dealing with new Outlook not syncing with Gmail, new messages can still arrive while an email you deleted in Outlook sits untouched in your Gmail inbox. Users of new Outlook for Windows began reporting this one-way sync problem in mid-to-late August 2026, and it’s still absent from Microsoft’s list of known issues. The first fix to try is to revoke Microsoft’s access in your Google Account, remove Gmail from new Outlook on this device only, and then add it back.
Users have reported mixed results with that reconnect. If messages you move, archive, or mark as read in Outlook still look unchanged in Gmail, you can use classic Outlook or manage your mail in Gmail on the web while you wait. If new mail isn’t arriving at all, that’s a different problem, and our guide on Outlook not receiving emails covers it.
Why New Outlook Stops Syncing With Gmail
It’s easy to assume your Gmail connection is fine when new mail keeps showing up. But receiving a message and sending a change back to Gmail are two separate parts of syncing. To see how one can work without the other, start with what happens when you add Gmail to new Outlook.
How New Outlook Connects to Your Gmail
When you add Gmail to new Outlook for Windows, Microsoft Cloud sync keeps a copy of your email, calendar, and contacts in step with Google. The Windows app relies on that cloud connection to pass your mailbox changes back to Gmail instead of making a direct IMAP connection.
So how can a message disappear from your Outlook inbox and still be there when you open Gmail? Outlook can show the change you made even when Gmail hasn’t received it. That also explains why reinstalling Outlook can leave you with the same problem.
What Changed in August 2026
In mid-August 2026, one new Outlook for Windows user reported that Gmail had stopped syncing in both directions. By late August and September, users were describing a more specific pattern. Changes they made in Gmail still appeared in Outlook, while moves, deletions, and other changes they made in Outlook stayed there.
The symptoms varied from one mailbox to the next. One user said read status still synced even though moves between folders had stopped, and some users reported that syncing resumed on its own on October 4. Microsoft hasn’t identified a cause or linked the problem to a specific Outlook build.
A Quick Test to Confirm One-Way Sync
Seeing new mail in Outlook tells you that messages are still coming in from Gmail. To check whether changes can go back the other way, try moving a message in each app and see where it ends up.
In new Outlook, pick an email you don’t mind moving and file it in a folder under your Gmail account. Open Gmail in your browser and check whether the message has the corresponding label or is still in its original location.
Now move a different test email to that same label in Gmail on the web. Return to new Outlook and check whether that message appears in the corresponding Gmail folder.
| What you test | Result you see | What it tells you |
|---|---|---|
| Move a message in new Outlook | The message still has its original location in Gmail on the web | The move from Outlook hasn’t reached Gmail |
| Move a message in Gmail on the web after the Outlook move failed | The message appears in the expected Outlook folder | Folder changes are syncing from Gmail to Outlook only |
| Move a message in each app | Neither move appears in the other app | Folder changes are failing in both directions |
| Move a message in each app | Both moves appear in the other app | Folder moves are syncing in both directions for the messages you tested |
How to Fix New Outlook Not Syncing With Gmail
If your test confirms new Outlook not syncing with Gmail in one direction, start by reconnecting the account so you can grant Microsoft access again. Some users have reported success after reconnecting, while others still saw failed moves or deletes after several attempts. Before you remove Gmail from Outlook, save any drafts you can only see there and start with your Google Account.
Remove Microsoft’s Access in Your Google Account
Close new Outlook and open your Google Account in a browser. Go to Security and open Your connections to third-party apps & services. While you’re there, look for apps you don’t recognize, and if anything looks wrong, our guide on a hacked Gmail account walks you through recovery.
Select Access to your Google Account, then choose Microsoft apps & services. Open See details, select Remove access, and choose Confirm. Microsoft can access your Google Account again once you reconnect it and grant permission. Google explains how these third-party connections work if you want more detail.
Remove Gmail From New Outlook on This Device Only
Reopen new Outlook and select View settings from the View tab, or choose Account info from the File tab. Go to Accounts, then open Your accounts or Email accounts, depending on which label you see. Select Manage next to your Gmail address.
Under Account details, select Remove and choose the option for this device only. Removing the account from all devices can permanently delete data stored only in the Microsoft Cloud. Your Gmail account stays active when you remove it from Outlook.
Add Gmail Back and Allow Access
Restart new Outlook and go back to Accounts. Open Your accounts or Email accounts, select Add Account, enter your Gmail address under Suggested account, and choose Continue. If you see a screen called Sync your Gmail account, select Continue again.
Sign in with Google, select Allow on the Google permission screen, then choose Done in Outlook. Once your mailbox is back, move a test email in Outlook and check Gmail on the web. You can also mark a message as read or delete a disposable email to see which changes now carry over.
Repair or Reset the Outlook App
Open Windows Settings, go to Apps, and select Installed apps. Find Outlook (new), open its three-dot menu, and choose Advanced options. Select Repair, then reopen Outlook and repeat the move test. If OneDrive is acting up on the same PC, our guide to OneDrive not syncing on Windows 11 is worth a look too.
If the move still fails, return to Advanced options and select Reset. Reset clears Outlook’s local app data, so you may need to add your accounts again. This can help if local app data is part of the problem, though changes from Outlook still reach Gmail through the Microsoft Cloud.
Check That Your Gmail Labels Show in IMAP
Open Gmail on your computer and select Settings, then See all settings. Open the Labels tab and check that Show in IMAP is selected for Inbox, Sent Mail, Trash, and All Mail. Do the same for any other labels you want to see as folders in Outlook.
If a move fails when you file a message in a folder stored only on your computer, try moving it to a folder under your Gmail account. Users have reported better results when filing into Gmail labels with Show in IMAP selected. For personal Google accounts, IMAP itself has been on by default since January 2025 and no longer has an on or off switch.
Keep New Outlook Updated
Install any available update for new Outlook, then repeat the move test with a disposable message. Check Gmail on the web after the move to see whether the change now carries over.
If the move still fails, note your new Outlook version so you can include it in a report. One user reported the problem on Windows 11 with new Outlook version 1.2026.902.100, and Microsoft’s known-issues list gives no version that resolves it.
Outdated Fixes You Can Skip
If Gmail still sends new mail to Outlook, you might be tempted to turn on IMAP or press Sync a few more times. Neither step will restore changes that fail to reach Gmail through the Microsoft Cloud. Here’s what those two fixes mean for your account today.
You Don’t Need to Turn on IMAP
Google has kept IMAP on for personal Gmail accounts since January 2025. If you open Forwarding and POP/IMAP and can’t find Enable IMAP, you can stop looking. Google removed the switch for personal accounts.
You can still check Show in IMAP on the Labels tab if a Gmail label is missing from Outlook. That option controls which labels are available as folders. If you can already see the folder in both apps and moves still fail in one direction, go back to the move test to confirm where the change stops.
The Sync Button Won’t Help With Gmail
The manual Sync button in new Outlook has been reported to skip Gmail accounts. Pressing F9 won’t force your Outlook moves or deletions to reach Gmail either.
If you need to clear out your inbox now, open Gmail on the web and make the changes there. If your test showed that Gmail changes still reach Outlook, you should see those moves and deletions carry over in that direction.
Workarounds While You Wait for Microsoft
You can keep managing your Gmail inbox even if reconnecting the account didn’t bring back two-way sync. Users have reported that classic Outlook and Outlook mobile can still pass changes back to Gmail, and you can make those changes directly in Gmail on the web. Start with whichever option fits how you check your mail.
Switch Back to Classic Outlook
Look for the toggle at the top right of new Outlook. Choose Use classic Outlook this time if you want to try it for one launch. If you want classic Outlook to open from then on, choose Switch back to classic Outlook and follow the feedback prompt.
If the toggle is missing, open the Windows Start menu and look for Outlook (classic). Classic Outlook needs to be installed for you to open it. Once you’re in, move a test email and check whether the move shows up in Gmail on the web.
Use Gmail on the Web or Outlook Mobile
Open Gmail in your browser when you need to delete, move, or archive a message. If the Gmail-to-Outlook side of sync still works, those changes should appear in new Outlook too.
Some users reported that Outlook mobile could still send changes back to Gmail while new Outlook for Windows couldn’t. If you prefer to work from your phone, try moving one message in Outlook mobile and verify the result in Gmail on the web before you move a batch.
Clean Up Duplicate Emails
Some users reported seeing extra inbox copies after a deletion or archive failed in new Outlook. If you see two copies in Outlook, check the same message in Gmail on the web before deleting either one. If the duplicates also appear in Gmail, handle the cleanup there.
If you’re using classic Outlook and seeing duplicate sent messages, open File and choose Options, then Mail. Under Save messages, clear Save copies of messages in the Sent Items folder. Gmail already keeps a copy of the mail you send.
How to Report the Problem to Microsoft
The best time to send a report is while you can still reproduce the failed move or deletion. In new Outlook, open Help, choose Feedback, and select Report a problem.
Include your Windows version, your new Outlook version, and when you first noticed the problem. Describe what happened in each direction, such as a move that appeared in Outlook after you made it in Gmail but failed when you started in Outlook. If you already removed and re-added Gmail, say whether that changed the result.
What to Do Next
If you’ve just reconnected Gmail, give the two-way move test another go. Then try the action you use most, whether that’s archiving an email or marking it as read. A folder move can work even if another change still fails.
If your changes still stop at new Outlook, send Microsoft your test results and use the app where those changes go through. Gmail on the web is there whenever you need to clear your inbox, and you can try classic Outlook if you’d rather keep working from your desktop.
FAQs
Emails you delete in new Outlook stay in Gmail when the deletion fails to reach Google through the Microsoft Cloud. New messages can still arrive in Outlook because the Gmail-to-Outlook side of the connection can keep working.
Your Gmail emails stay in your Google account when you remove Gmail from new Outlook on this device only and then add it back. If you remove it from all devices instead, anything stored only in the Microsoft Cloud can be lost for good. Save a copy of any drafts you can only see in Outlook before you reconnect.
New Outlook for Windows syncs Gmail through the Microsoft Cloud without opening a direct IMAP connection from the Windows app. The cloud connection syncs a copy of your Gmail messages, calendar, and contacts.
You generally don’t need a Google app password to add Gmail to new Outlook. Use Sign in with Google, then select Allow when Google asks whether to give Microsoft access to your account.
Microsoft hasn’t announced a fix date on its known-issues page for new Outlook for Windows. As of November 10, 2026, the one-way Gmail sync problem still has no entry there. You can report a failed move or deletion through Help, Feedback, and Report a problem.
Classic Outlook has synced Gmail changes for users who ran into one-way sync in new Outlook for Windows. Classic Outlook connects directly to Gmail over IMAP. Try moving one email in classic Outlook and checking Gmail on the web to see if it works for your account.
