Error Code 0x7 - Rdp Error Code 0x3 Extended

RDP error code 0x3 (with extended code 0x7) typically signals a general connectivity failure where the client cannot reach the remote computer. This is often due to network instabilities, firewall restrictions, or server-side driver issues. Common Fixes RDP on to connection server blocked - CyberArk

Step-by-Step Instructions:

  1. Close all RDP sessions. Ensure no mstsc.exe processes are running (check Task Manager).
  2. Open Registry Editor:
    • Press Win + R, type regedit, and press Enter.
  3. Navigate to the licensing key:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing
  4. Back up the key: Right-click on MSLicensing → Export → Save as .reg file.
  5. Delete the entire MSLicensing key: Right-click it and select Delete. Confirm the action.
  6. Navigate to the second licensing key (if it exists):
    • HKEY_CURRENT_USER\SOFTWARE\Microsoft\MSLicensing
  7. Delete this key as well.
  8. Close Registry Editor.
  9. Restart your computer. (Not strictly required, but recommended to clear memory handles).
  10. Re-attempt your RDP connection. You will likely be prompted to accept a new certificate and licensing agreement. This is normal.

Expected outcome: The error should disappear immediately. If it persists, move to Fix #2.

Method C: Disable NLA Temporarily (Diagnostics)

Disabling NLA (Network Level Authentication) can help determine if the issue is authentication-specific or network-specific. Note: This lowers security; use only for troubleshooting. rdp error code 0x3 extended error code 0x7

  1. On the target machine, right-click This PC > Properties.
  2. Click Remote Desktop settings.
  3. Uncheck "Allow connections only from computers running Remote Desktop with Network Level Authentication".
  4. Attempt to connect.
    • Result: If this works, the issue is strictly related to user permissions or CredSSP versions (see Method D). If it still fails, the issue is likely a network firewall or port blocking issue.

4. Advanced Troubleshooting

If the above methods fail, enable detailed CredSSP logging on the target server.

  1. Open Registry Editor (regedit).
  2. Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI
  3. Check the LogonCredentialProvider or enable CAPI2 logging in Event Viewer to diagnose certificate chain issues if Smart Cards are involved.

Summary Recommendation: In 90% of cases involving Extended Error 0x7, Method A (adding the user to the Remote Desktop Users group) resolves the issue. The error is essentially the server saying, "I see you, but you aren't authorized to perform this handshake." RDP error code 0x3 (with extended code 0x7

Preventing Future RDP Error 0x3 / 0x7

Once you have resolved the error, take these steps to ensure it never returns:

  1. Sysprep your images: If you clone VMs, always run sysprep /generalize. This strips unique RDP licensing data from the source machine.
  2. Use Group Policy to auto-clean licensing: Deploy a startup script that deletes the MSLicensing registry key on an annual basis.
  3. Standardize Windows versions: Mixing Windows 10/11 Home (which doesn't host RDP) with Pro/Enterprise as clients can cause edge-case licensing quirks.
  4. Monitor Event Logs:
    • Client-side: Event Viewer → Applications and Services → Microsoft → Windows → TerminalServices-ClientActiveXCore → Operational. Look for Event ID 1025 or 1026.
    • Server-side: Event Viewer → Terminal Services-RemoteConnectionManager → Operational. Look for Event ID 20480 or 20481 (licensing failure).
  5. Keep CredSSP updated: Install the latest Windows updates on both client and server to avoid the notorious CredSSP "encryption oracle remediation" issues (CVE-2018-0886).

Step-by-Step Solutions

3. Adjust RD Gateway SSL Settings

On the RD Gateway server:

  • Open RD Gateway Manager.
  • Right-click the server → Properties → SSL Certificate tab.
  • Ensure the correct certificate is selected.
  • Under Transport Settings, confirm that “Use SSL 3.0/TLS 1.0” is enabled only if necessary; prefer TLS 1.2.

Prevention Best Practices

  • Use certificates from a trusted public or enterprise CA, not self-signed.
  • Automate certificate renewal before expiry.
  • Enforce TLS 1.2 or higher across all RDP and RD Gateway roles.
  • Avoid SSL inspection for RDP traffic (or use a dedicated RDP proxy).
  • Regularly test remote connectivity after patching.

Method A: Verify Local Group Membership (Primary Fix)

If the user is not explicitly added to the correct group, the Extended Error 0x7 will trigger immediately upon connection attempt.

  1. Log into the target machine (locally or via console/admin session).
  2. Open Computer Management (compmgmt.msc).
  3. Navigate to Local Users and Groups > Groups.
  4. Open Remote Desktop Users.
  5. Ensure the user account attempting the connection is listed here.
    • Note: If the target is a Domain Controller, you must add the user to the "Remote Desktop Users" group in Active Directory, and ensure that group is allowed in the Domain Controller GPO.
Scroll to Top