New Outlook doesn't close with "X" any longer

Question

New Outlook doesn't close with "X" any longer

Terry Smith 20

New Outlook doesn't close with "X" any longer. File/Exit doesn't work either. I have to show hidden icons on taskbar, right click on Outlook icon and exit. Seems to say this is a new Ai change but not sure.

Brian Miller 0 Reputation points

2026-06-30T17:10:09.8733333+00:00

Terry - try the following. Make sure that in your date and time sync and automatic are both turned on. This seemed to have worked for me. Look on you tube for the following video - How To Fix Microsoft Outlook Not Opening or Working (Easy Guide 2026) I know I do not like to click on links but yu should be able to find the video that walks you through the fix**.**
Michael Shilling 5 Reputation points

2026-06-30T22:37:15.0766667+00:00

I went into Windows Settings > Apps > Installed Apps > Outlook > click the 3 dots to the far right, select Advanced Options. Then select Reset. IMPORTANT! This will delete all accounts and data! Any MS Accounts should be added back automatically when you first open (mine was), but you will have to add any third-party accounts (Gmail, etc.).
Terry Smith 20 Reputation points

2026-06-30T23:36:30.3166667+00:00

It won't last. Try replying to an email and everything will lock up.
Terry Smith 20 Reputation points

2026-06-30T23:38:12.99+00:00

Copilot says best option is a Clean Wipe which I commented "ranted" back to the Tier-3 I'm working with as unacceptable for MS to create something that would corrupt an application like New Outlook.
Michael Shilling 5 Reputation points

2026-07-01T03:06:15.5633333+00:00

Unfortunately, you were right. It only lasted for the one time and now is back to not working again. I searched the Insider forums but didn't find anything so I started a thread here https://techcommunity.microsoft.com/discussions/windowsinsiderprogram/new-outlook-unable-to-close/4532340 Guess they will move it if it's already reported somewhere else and I just missed it.
Kenneth Lui 0 Reputation points

2026-07-01T17:08:27.86+00:00

Same on my side as well. A reset provided temporary relief by adding a new bar on the top for maximizing, minimizing, and closing, but that goes away pretty soon and I'm left with the same non-closing issue.

4 answers

Your answer

Brian Miller 0 Reputation points

2026-06-30T17:10:09.8733333+00:00

Terry - try the following. Make sure that in your date and time sync and automatic are both turned on. This seemed to have worked for me. Look on you tube for the following video - How To Fix Microsoft Outlook Not Opening or Working (Easy Guide 2026) I know I do not like to click on links but yu should be able to find the video that walks you through the fix**.**
Michael Shilling 5 Reputation points

2026-06-30T22:37:15.0766667+00:00

I went into Windows Settings > Apps > Installed Apps > Outlook > click the 3 dots to the far right, select Advanced Options. Then select Reset. IMPORTANT! This will delete all accounts and data! Any MS Accounts should be added back automatically when you first open (mine was), but you will have to add any third-party accounts (Gmail, etc.).
Terry Smith 20 Reputation points

2026-06-30T23:36:30.3166667+00:00

It won't last. Try replying to an email and everything will lock up.
Terry Smith 20 Reputation points

2026-06-30T23:38:12.99+00:00

Copilot says best option is a Clean Wipe which I commented "ranted" back to the Tier-3 I'm working with as unacceptable for MS to create something that would corrupt an application like New Outlook.
Michael Shilling 5 Reputation points

2026-07-01T03:06:15.5633333+00:00

Unfortunately, you were right. It only lasted for the one time and now is back to not working again. I searched the Insider forums but didn't find anything so I started a thread here https://techcommunity.microsoft.com/discussions/windowsinsiderprogram/new-outlook-unable-to-close/4532340 Guess they will move it if it's already reported somewhere else and I just missed it.
Kenneth Lui 0 Reputation points

2026-07-01T17:08:27.86+00:00

Same on my side as well. A reset provided temporary relief by adding a new bar on the top for maximizing, minimizing, and closing, but that goes away pretty soon and I'm left with the same non-closing issue.

Answer 1

Terry Smith 20

The “X” to close doesn’t highlight at all. After more review…

Can open settings at first. Then would not open after.
"X" to close not working
New email not working
File pull-down's not working

Totally unusable. Back on Classic now. Have Tier-3 support scheduled. Will let you know

Jeronimo Fuerte 41,025 Reputation points Independent Advisor

2026-06-30T17:19:06.31+00:00
Thanks for the update. Since the X button does not highlight, File menu actions stop responding, and even New Email does not work, this sounds like the interface is becoming unresponsive.

Please try this with New Outlook:

Please check this setting in new Outlook View > View settings > General > Notifications > Notifications in Outlook. If Send notifications when Outlook is closed is enabled, try turning it off. Then close Outlook again and check if the behavior changes.

Close it from the system tray or open Task Manager, select Microsoft Outlook, and choose End task.

Go to Settings > Apps > Installed apps > Outlook (new), open Advanced options, then try Repair.

If Repair does not help, try Reset. You may need to sign in again afterward.

If it still happens, uninstall Outlook (new) and reinstall it from the Microsoft Store.

Since you already have Tier-3 support scheduled, I would also report the exact New Outlook version/build and mention that multiple UI controls stop responding, not only the X button.

For now, staying on Classic Outlook is a reasonable workaround if New Outlook is unusable.
Terry Smith 20 Reputation points

2026-06-30T20:42:52.0066667+00:00

Interesting with the W11 reset that Tier-2 performed. I tried New Outlook. Starts out working fine. Settings, X-close, File menu. Then everything freezes when I do a email reply. No Settings, X-close, File menu. Crazy
Jeronimo Fuerte 41,025 Reputation points Independent Advisor

2026-06-30T21:29:30.17+00:00

Have you added the account again, or was it still there after the reset? Is this an Outlook account?
Terry Smith 20 Reputation points

2026-06-30T22:01:45.3066667+00:00

I have several accounts. My Outlook account is the only one that came back.
Jeronimo Fuerte 41,025 Reputation points Independent Advisor

2026-06-30T22:05:01.87+00:00

Ok, and that's the one on which your app gets frozen if you try to reply to an email?

Answer 2

Based on the additional information shared in the thread, this seems to be related to the Windows Insider build rather than only the New Outlook app. Since Repair, Reset, reinstalling New Outlook, and clearing the local state/cache did not resolve the issue, the practical workarounds are:

Use Classic Outlook, if available.
Use Outlook on the web.
If the Go back option is still available under Settings > System > Recovery, rolling back to the previous build may help.
Wait for the next Insider update and report this through Feedback Hub under Windows Insider / Apps / Outlook.
If you would prefer a stable OS, leave the Insider beta and keep only the official Windows releases

I would also be careful with the Copilot explanation. Unless Microsoft publishes it in the official release notes or acknowledges it in Feedback Hub, I would treat it as an unconfirmed Insider regression rather than a documented known issue.

Because this is happening on a pre-release Insider build, the best next step is to file Feedback Hub reports with the exact OS build, Outlook version, and steps to reproduce, especially since the issue appears after replying to an email.

Michael Shilling 5 Reputation points

2026-07-02T03:27:13.59+00:00

This issue has been confirmed by Microsoft, and they have given an official response stating, "We've figured out the issue and are working on a fix, appreciate your patience".

Answer 3

Kenneth Lui 0

Not being able to close Outlook using the X on the top right is an issue on both my desktop and laptop. Resetting the app only temporarily solves it by adding a new "minimize, maximize, close" on top of the existing one. Outlook later removes it and I'm back to the same problem.

I'm on the Windows 11 Home Insider Preview, build 26220.8754. Hoping this can be addressed by the Microsoft Team with a fix in the next update.

Jeronimo Fuerte 41,025 Reputation points Independent Advisor

2026-07-01T21:21:16.34+00:00
When you join the Insider Preview program, you are using a version that is still being tested, so these kinds of issues can happen because it is not a final release. Since the problem seems to be related to the Outlook account that is not fully removed when you reset the app, I would suggest trying the reset again first, and then clearing the new Outlook local cache:

Close new Outlook completely.

Press Win + R.

Paste the following command: olk.exe --clearLocalState

Press Enter.

Reopen new Outlook and add/sign in to the account again if requested.

This should force new Outlook to rebuild its local state/cache for the account.
Michael Shilling 5 Reputation points

2026-07-01T21:33:23.3166667+00:00

Hi Jeronimo,

Tried those steps. Got the exact same results as when I cleared the data. Still unable to close or use most options.
Terry Smith 20 Reputation points

2026-07-01T21:35:41.44+00:00

Hi Jeronimo,

Same here as Michael stated. Did not help. Same problem.
Michael Shilling 5 Reputation points

2026-07-01T22:00:57.32+00:00

According to Copilot, Insider Build 26220.8754 is one of the builds where WinUI window-frame dispatch is broken for WebView2‑hosted apps such as Outlook. It says that it is not an Outlook issue, but a Windows issue which means we have to wait until MS rolls out the patch for it. Copilot also says the only other fix is to rollback the version. I posted on the Insider forum, but AI marked it as Spam so it got deleted - go figure.
Terry Smith 20 Reputation points

2026-07-01T22:15:14.9833333+00:00

Thanks Michael...Interesting! The plot thickens
Terry Smith 20 Reputation points

2026-07-01T22:38:27.3933333+00:00

I checked Copilot mentioning Michael's findings with my machine specifics and it confirmed I'm affected Windows Insider build

OS build: 26220.8754

This is exactly the build where the WinUI window‑frame dispatch regression is documented.

That means:

✔ Your colleague’s Copilot result was correct

✔ The issue is in Windows, not Outlook

✔ There is no local fix

✔ You must wait for Microsoft to patch the regression

✔ Rolling back to the previous Insider build does fix it

✔ Staying on 26220.8754 means Outlook’s “X” will not close the window
Michael Shilling 5 Reputation points

2026-07-01T23:37:16.1933333+00:00
Thanks for confirming, Terry. It also looks like we are outside of the rollback window, or at least I am. I went into Settings > Windows Update > Advanced Options > Recovery; and Go Back is greyed out with a message stating "This option is no longer available on this PC". So, it looks like we have the following choices - none of which are optimal.

Wait for MS to rollout the update, using the Right Click > Quit option until then.

Use Classic Outlook (not an option for me as I no longer have the toggle).

Use the web version as it is not tied to Windows.

Clean wipe of Windows and start all over.

I posted again on the Windows Insider forums. It's been "In Review" for over an hour now, so at least AI didn't mark it as Spam right away. Hopefully, it will show up here soon, so the Insider team sees it ... https://techcommunity.microsoft.com/category/windows/discussions/windowsinsiderprogram
Terry Smith 20 Reputation points

2026-07-01T23:40:42.18+00:00

More research...I'm on Insider "Beta", but Microsoft temporarily push Canary payloads through the Beta pipeline. Canary builds often include:

Experimental WinUI frame logic

WebView2 window‑hook changes

Shell dispatch modifications

New Outlook uses:

Custom close‑event interception

WebView2

WinUI window frames

So Canary broke it. Beta normally wouldn’t.

Copilot recommends pausing updates for 7d, and leaving Insider after the next Beta release fixes Outlook.

Best if everyone check Copilot to reverify.
Terry Smith 20 Reputation points

2026-07-01T23:44:53.14+00:00
I have separate New Outlook and Classic accounts and don't have to toggle.

Tips on Exit the Insider Program from Copilot

Go to:

Settings → Windows Update → Windows Insider Program → Stop getting Insider builds

At that moment:

You leave Insider

You stay on your current build

You move to public updates going forward

No clean install

No rollback

No data loss

No Canary leftovers

⭐ Why this works (and why it’s clean)

When you install the next true Beta build:

All Canary binaries are overwritten

All experimental WinUI/WebView2 components are replaced

All Canary feature toggles are removed

All Canary servicing stack pieces are replaced

All Insider-only packages are cleaned up automatically

The only “leftovers” are tiny update logs and cache files — Windows cleans those itself.

So yes — Option 1 is clean, safe, and leaves no meaningful junk behind.

exit the Insider Program

Go to:

Settings → Windows Update → Windows Insider Program → Stop getting Insider builds

At that moment:

You leave Insider

You stay on your current build

You move to public updates going forward

No clean install

No rollback

No data loss

No Canary leftovers

⭐ Why this works (and why it’s clean)

When you install the next true Beta build:

All Canary binaries are overwritten

All experimental WinUI/WebView2 components are replaced

All Canary feature toggles are removed

All Canary servicing stack pieces are replaced

All Insider-only packages are cleaned up automatically

The only “leftovers” are tiny update logs and cache files — Windows cleans those itself.

So yes — Option 1 is clean, safe, and leaves no meaningful junk behind.
Michael Shilling 5 Reputation points

2026-07-02T00:01:57.9333333+00:00

I got the same info from Copilot. For some reason, we got pushed into the Canary build. I guess I will just wait until the next update. It should be along soon and if it doesn't fix the issue, I'll go from there and decide if I will stay in Insider builds or not. I've been doing them for quite a few years, never been pushed into another channel before.

Answer 4

Jeronimo Fuerte 41,025 Independent Advisor

Sorry to hear that you are having trouble with this. Just to confirm, when you click the X button or use File > Exit, what exactly happens?

Does Outlook only minimize and remain active near the clock/system tray, does it stay open on the screen, or does the button not do anything at all?

Brian Miller 0 Reputation points

2026-06-29T22:24:58.54+00:00

Same problem - Most all of the actions under File do nothing and the X or File > Exit button does nothing as well.
Michael Shilling 5 Reputation points

2026-06-30T21:59:40.08+00:00

Having the same issue. I can open Outlook just fine, but when I attempt to close it using the X, nothing happens. Same thing happens when I click Settings or Minimize. The only way I can close Outlook right now is by right clicking the app icon in the Task Bar and selecting Quit (only the one on the right side, the actual Window task {close Window} does not work either. For email options, I can read emails fine but cannot create a new Event. It just does nothing when I click the New > Event button. Notification button and To Do work fine.
Terry Smith 20 Reputation points

2026-06-30T22:03:06.77+00:00

I have several accounts. My Outlook account is the only one that came back. I right click on Outlook in the System Tray and it quits out.
Terry Smith 20 Reputation points

2026-06-30T22:06:01.01+00:00

Hi Michael,

Sounds like same issue. Are you using Windows Insider? Copilot says this is the problem.
Michael Shilling 5 Reputation points

2026-06-30T22:22:32.51+00:00

I am using Windows Insider. I wondered if maybe that was the issue, because it has happened on both machines that are on Build 26220.8754.ge_release_svc_betafit_prod1.260620-2230. I also asked Copilot about this and confirmed it seems to be an Insider issue. Here are the fixes Copilot suggests.

1. Toggle the Outlook preview features

This forces Outlook to reload its WinUI frame.

Steps: Settings → General → Outlook Preferences → turn off “Try the new Outlook features” Restart Outlook Turn it back on (optional)

This has restored window controls for several users.

2. Repair the app

Windows Settings → Apps → Installed Apps → Outlook (new) → Advanced Options → Repair

This resets the app’s frame bindings without removing your account.

3. Reinstall New Outlook

Settings → Apps → Installed Apps → Outlook (new) → Uninstall Then reinstall from the Microsoft Store

This works when the frame registration is corrupted.

4. Switch temporarily to Classic Outlook

If you need reliability while Insider builds stabilize, Classic Outlook does not have this issue.

5. Roll back the latest Insider build

If this started immediately after your last update, rolling back resolves it 100% of the time.

New Outlook doesn't close with "X" any longer

4 answers

2. Repair the app

3. Reinstall New Outlook

4. Switch temporarily to Classic Outlook

5. Roll back the latest Insider build

Your answer