No Microsoft-confirmed New Outlook outage is currently identified, so check the live service status and then test Outlook on the web to distinguish a service problem from a Windows app problem.
1. Check whether Outlook is down
Open the Microsoft service health status page and look for an active Outlook or Microsoft 365 incident.^1^
Microsoft’s current New Outlook known-issues page does not list a service-wide “app won’t open” incident.^2^
Then sign in at https://outlook.com:
- The website also fails: This may be an account, connection, or service issue. Recheck the service-status page.
- The website works: Your mailbox is available, and the issue is limited to the app on this laptop. Use the website temporarily and continue below.
2. Fully close and reopen New Outlook
- Press Ctrl+Shift+Esc to open Task Manager.
- Find Microsoft Outlook under Apps or Background processes.
- Select it and choose End task.
- Open Microsoft Store, search for Outlook for Windows, and launch it directly from its Store page rather than the existing shortcut.^3^
3. Repair the app
On Windows 11:
- Open Start → Settings → Apps → Installed apps.
- Find Outlook (new) or Outlook for Windows.
- Select the three-dot menu → Advanced options.
- Select Repair.
- Restart the laptop and test Outlook.
If Repair does not work, return to the same page and select Reset, then restart Windows.^4^
Reset is more disruptive than Repair and may require you to sign in or configure the app again, so use Repair first.
If it still does not open
Use Task Manager while launching Outlook:
- If Outlook remains running but no window appears, note that behavior.
- If it appears briefly and disappears, open Event Viewer → Windows Logs → Application, launch Outlook again, and inspect the newest Outlook-related error. Record the event source, event ID, and exception text for a support request.^3^
Do not use Outlook /safe, /resetnavpane, COM add-in removal, SCANPST, or classic Outlook profile repair for this case. Those procedures apply to classic Outlook, not New Outlook for Windows.^3^
References
- Microsoft service health status
- Fixes or workarounds for recent issues in new Outlook for Windows ...
- outlook wont open - Microsoft Q&A
- I can't open outlook app on windows - Microsoft Q&A