If the issue is related to the Remote Desktop Gateway, a registry adjustment may help. Registry Editor (regedit.exe). HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client Create a new DWORD (32-bit) Value RDGClientTransport and set its value to Restart your computer. Are you connecting to a local server cloud-hosted virtual machine? Fix Remote Desktop Error Code 0x904: 4 Working Solutions
Ensure that the NETWORK SERVICE or SYSTEM accounts have permissions. Restart the Remote Desktop Services service. 3. Change RDP Transport Layer (RDGClientTransport)
If the basic steps don't resolve the issue, more advanced solutions are required, primarily to force compatibility with older systems.
Unlike simple credential rejection errors, Error 0x904 coupled with Extended Error 0x7 signals an underlying breakdown in on the host server or Virtual Machine (VM). Root Causes of Error 0x904 / Extended Error 0x7 If the issue is related to the Remote
) on certain Windows 11 builds struggles with specific security layers. How to Fix It
The most successful fix reported by IT administrators is renewing the server's self-signed certificate.
: Modern firewalls or endpoint protection suites (such as Bitdefender) occasionally flag secure RDP initialization routines as anomalous activity. Phase 1: Resolving Host-Side Certificate & Security Faults Are you connecting to a local server cloud-hosted
The Remote Desktop 0x904 error is a challenging but solvable problem that arises from a disruption in the RDP connection pipeline—whether from a weak network, a security negotiation mismatch, or a server-side service error. By following a systematic troubleshooting approach—starting with verifying basic network connectivity and firewall rules, then moving to security layer adjustments and event log analysis—you can effectively isolate and resolve the underlying cause. This methodology not only resolves the immediate issue but also equips you with the knowledge to handle similar RDP connectivity challenges in the future.
On the RD Gateway server:
The RDP client established a TCP connection, but during session negotiation or encryption handshake, the remote server’s network stack or RDP service sent a TCP RST (reset) packet, and the local client’s network buffer management entered an invalid state. navigate to the affected VM
Go to your , navigate to the affected VM, and select Run Command from the left menu.
: Third-party security software (e.g., Bitdefender) or Windows Firewall may block mstsc.exe or the RDP port (3389).