Remote Desktop Connection Error Code 0x904 Extended Error Code 0x7 Best May 2026

Troubleshooting Remote Desktop Connection Error Code 0x904 with Extended Error Code 0x7

• Open Remote Desktop Connection
• Go to Advanced tab
• Under "Security", uncheck "Always prompt for credentials"
• Select "Connect" → Save as .rdp file if needed

• Run gpedit.msc → Computer Configuration → Administrative Templates → System → Credentials Delegation → Encryption Oracle Remediation. Set to “Mitigated” or “Vulnerable” temporarily to test (prefer Mitigated).
• Reboot or run gpupdate /force.

• Name: AuthenticationLevelOverride
• Value: 0 (This sets authentication level to "No authentication").

Fix 2: Update both computers
Run Windows Update on both the client and the remote server. Error 0x7 often appears when CredSSP versions differ. Install all pending updates, especially: Open Remote Desktop Connection Go to Advanced tab