Outlook email not working today 11/12/2026. How does a novice fix this?

A Microsoft 365/Outlook service incident is affecting some users on November 12, 2026, so first test your account through its correct webmail service before repairing Classic Outlook. ^1^

1. Check whether this is the outage or the Windows application

Open a web browser such as Edge or Chrome and use the website belonging to your email provider:

• Outlook.com, Hotmail, or Live address: use Outlook.com.
• Microsoft 365 work or school account: use Outlook on the web through your organization’s Microsoft 365 portal.
• Gmail, Yahoo, an Internet provider, or another account: use that provider’s webmail site instead.

Then interpret the result:

• Webmail also fails: This may be the Microsoft incident, a different provider outage, an Internet problem, or an account/sign-in issue. A Microsoft service outage cannot be repaired on your PC; Microsoft must restore the service. For a work or school account, contact your IT help desk because its administrators can see tenant-specific service advisories.
• Webmail works: Your mailbox and password are functioning. Continue below because the problem is probably limited to Classic Outlook on this computer.
• Outlook’s window will not appear at all: Continue below even during the service incident. A backend outage can prevent mailbox access, but normally does not explain why the application itself never launches.

Avoid reinstalling Outlook or removing your email profile while a service outage is still active.

2. Close a hidden Outlook process

1. Press Ctrl+Shift+Esc to open Task Manager.
2. Look for Microsoft Outlook or OUTLOOK.EXE.
3. Select it and choose End task.
4. Try opening Outlook again.

A hidden Outlook process can prevent another Outlook window from opening. ^2^

3. Start Outlook without add-ins

1. Press Windows key+R.
2. Enter: Outlook /safe
3. Select OK, accept the default profile, and enter your password if requested.

If Outlook opens in Safe Mode:

1. Select File > Options > Add-ins.
2. At the bottom, select COM Add-ins beside Manage, then select Go.
3. Take a picture of the checked items.
4. Clear every checkbox—do not select Remove—and choose OK.
5. Exit and reopen Outlook normally.
6. Later, enable the add-ins individually, restarting Outlook each time, until the faulty one is identified. ^3^

4. If Safe Mode also fails

Run Microsoft’s automated startup troubleshooter:

1. Open Start, search for Get Help, and open it.
2. Search for Classic Outlook startup troubleshooter.
3. Follow the prompts.

The troubleshooter applies to Classic Outlook on Windows 10 or later and must run on the affected computer. ^4^

If it cannot fix Outlook, repair Office:

1. Open Settings > Apps > Installed apps.
2. Find Microsoft 365 or Microsoft Office.
3. Select the three-dot menu, then Modify.
4. Run Quick Repair first.
5. If Outlook still fails, return to the same location and run Online Repair. Online Repair is more extensive and requires an Internet connection. ^5^

If webmail remains unavailable after the service is reported restored, contact the email provider. For a work or school mailbox, contact the organization’s IT administrator; for a personal Microsoft account, open the Windows Get Help app and request Microsoft account or Outlook support.

References

1. Microsoft Outlook outage affects thousands: What to know about the November 12 incident
2. Microsoft outlook won't start, if i click on outlook app it will show hourglass for a few seconds but nothing happens - Microsoft Q&A
3. I can’t start Microsoft Outlook or receive the error “Cannot start Microsoft Outlook. Cannot open the Outlook Window” | Microsoft Support
4. Resolve Outlook for Windows issues with automated troubleshooting tools | Microsoft Support
5. [Classic Outlook](https://support.microsoft.com/outlook/getstarted/outlook-for-windows-not-responding-hangs-freezes-or-stops-working)