How to Fix 9hehw Error Code in Outlook or Microsoft Teams

The 9hehw error code in Outlook or Microsoft Teams is typically related to authentication or sign-in failures when the app attempts to connect to Microsoft services. Users often encounter this error during sign-in, while switching accounts, or when Outlook or Teams fails to load mailboxes, calendars, or chats properly.

This error commonly appears due to corrupted cached credentials, account sync issues, outdated app components, or problems with Microsoft account authentication services on Windows 11. In many cases, the apps themselves are not broken, but they are unable to validate the user session correctly.

Fixing the 9hehw error code in Outlook or Teams involves refreshing account credentials, resetting app data, and ensuring required Microsoft services are running correctly. The steps below explain how to resolve the issue and restore normal app functionality.

How to Fix 9hehw Error Code in Outlook or Microsoft Teams

The methods in this section focus on resolving sign-in conflicts, clearing cached data, and repairing Microsoft apps. Follow the steps in order and test Outlook or Teams after each method.

1. Restart the Computer and Reopen Outlook or Teams

Temporary authentication issues can trigger the error.

1. Close Outlook and Microsoft Teams completely.
2. Restart the computer.
3. Open Outlook or Teams again and check if the error is resolved.

A restart refreshes background Microsoft services and account sessions.

2. Sign Out and Sign Back In to the App

Refreshing the sign-in session often fixes the error.

1. Open Outlook or Microsoft Teams.
2. Click your profile picture.
3. Select Sign out.
4. Close the app completely.
5. Reopen the app and sign in again using your Microsoft account.

This forces the app to rebuild authentication tokens.

3. Remove and Re-add the Work or School Account in Windows

Account sync issues at the system level can cause this error.

1. Open Settings.
2. Go to Accounts.
3. Select Access work or school.
4. Click your connected account.
5. Select Disconnect.
6. Restart the computer.
7. Add the account again and sign in.
8. Open Outlook or Teams and test.

This refreshes system-wide account authentication.

4. Clear Cached Credentials from Credential Manager

Corrupted credentials can block sign-in.

1. Press Windows + S and search for Credential Manager.
2. Open Credential Manager.
3. Select Windows Credentials.
4. Remove entries related to:
   • Microsoft
   • Outlook
   • Teams
   • Office
5. Restart the computer.
6. Open Outlook or Teams and sign in again.

Windows recreates fresh credentials automatically.

5. Clear Microsoft Teams Cache (Teams Only)

Corrupted cache files can trigger sign-in errors.

1. Close Microsoft Teams completely.
2. Press Windows + R, type %appdata%\Microsoft\Teams, and press Enter.
3. Delete all files and folders inside the Teams folder.
4. Restart the computer.
5. Open Teams and sign in again.

This resets Teams without uninstalling it.

6. Repair Microsoft Office or Microsoft Teams

Repairing fixes broken app components.

1. Open Settings.
2. Go to Apps > Installed apps.
3. Locate Microsoft 365, Outlook, or Microsoft Teams.
4. Click the three-dot menu and select Modify or Advanced options.
5. Choose Repair.
6. Restart the system after repair.

This restores damaged files and services.

7. Check Date and Time Settings

Incorrect time can break authentication.

1. Open Settings.
2. Go to Time & language.
3. Select Date & time.
4. Enable Set time automatically.
5. Enable Set time zone automatically.
6. Restart the computer.

Microsoft sign-in services rely on accurate system time.

8. Disable VPN or Proxy Connections

Network filtering can block Microsoft services.

1. Disconnect from any active VPN.
2. Disable proxy settings if configured.
3. Restart the computer.
4. Open Outlook or Teams and test again.

Microsoft authentication may fail behind certain VPNs.

9. Update Windows, Outlook, and Microsoft Teams

Outdated versions can cause compatibility issues.

1. Open Settings.
2. Go to Windows Update.
3. Install all available updates.
4. Update Outlook and Teams from Microsoft Store or within the apps.
5. Restart the computer.

Updates often fix known authentication bugs.

10. Reinstall Outlook or Microsoft Teams as a Last Resort

Reinstallation resets all app data.

1. Open Settings.
2. Go to Apps > Installed apps.
3. Uninstall Microsoft Teams or Microsoft Office.
4. Restart the computer.
5. Reinstall the app from official Microsoft sources.
6. Sign in and test.

This resolves persistent 9hehw error cases.

Final Thoughts

The 9hehw error code in Outlook or Microsoft Teams is usually caused by corrupted credentials, account sync issues, or authentication failures rather than a problem with your Microsoft account itself. In most cases, clearing cached credentials, reconnecting the account, or repairing the app resolves the issue quickly.