Using New Outlook on Windows for personal email, calendar, and contact management
Outlook issues can usually be fixed by restarting the app, repairing it, or reinstalling, depending on the device and version in use.
For Outlook on Windows (classic or new Outlook for Windows):
- Restart Outlook completely:
- Right-click Start > Task Manager.
- Select Microsoft Outlook > End task.
- Close Task Manager and open Outlook again.
- If using the new Outlook for Windows and it still fails or behaves unexpectedly, reset its local state:
- Close Outlook.
- Run the command:
olk.exe --clearLocalState. - Open new Outlook again and sign in to accounts when prompted.
- If new Outlook will not start or shows repeated errors even after that, delete its local data folders and let Outlook recreate them:
- Close all Microsoft apps (Outlook, Teams, etc.).
- Press Windows + R, type
appdata, press Enter. - Go to Local > Microsoft > Olk and delete the Olk folder.
- Go to Local > Microsoft > OneAuth and delete the OneAuth folder.
- Restart the computer and open Outlook again.
- If Outlook still has problems, run an Online Repair of Office instead of Quick Repair, following the steps in the Office repair article referenced below.
For Outlook mobile (if messages or notifications stopped working):
- Make sure the Outlook app is installed and updated.
- If sign-in or sync fails, remove and reinstall the Outlook app:
- Uninstall Outlook from the phone.
- Restart the phone.
- Reinstall Outlook from the app store and sign in again.
- If a Microsoft 365 work or school account is used and problems continue, contact the Microsoft 365 admin or technical support for the organization.
If none of these steps resolve the issue, use the Support and Recovery Assistant for Microsoft 365 (SaRA) for Outlook connection/profile problems, or open a support ticket through the Microsoft 365 admin center if available.
References:
- Troubleshoot Outlook for Windows issues
- Fix Outlook connection problems for Microsoft 365 account
- Fix Outlook account problems in Office 365 for business
- Troubleshoot Outlook mobile issues
- New Outlook has stopped working, Fails when starting after 30 to 60 seconds - Microsoft Q&A
- Detected a problem launching new Outlook - Microsoft Q&A
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- how i can fix the microsoft app problem - Microsoft Q&A