0x904 Extended Error Code 0x7 | Remote Desktop Connection Error Code

Ensure both and Remote Desktop (WebSocket) are checked for Private and Public networks.

Sometimes, Network Level Authentication (NLA) or encryption mismatches cause the 0x904 error. On the remote host, open .

This is particularly common on Azure VMs where the MachineKeys folder becomes corrupt, preventing new certificate generation. Step-by-Step Solutions 1. Renew Expired RDP Certificates Ensure both and Remote Desktop (WebSocket) are checked

Enable and set it to RDP .

Navigate to .

Click , browse to C:\Windows\System32\mstsc.exe , and add it to the list. 4. Adjust Security Layers (NLA Issues)

Log into the remote server (via a console or alternative remote tool). Press , type certlm.msc , and press Enter . Navigate to Remote Desktop > Certificates . This is particularly common on Azure VMs where

The is a generic network-related failure that prevents a client from establishing a session with a remote host. While it is often caused by unstable network conditions, it can also stem from expired security certificates, firewall blocks, or specific Windows 11 compatibility issues. Common Causes of Error 0x904

Windows Defender or third-party antivirus software (like Bitdefender) blocking mstsc.exe or RDP traffic. Navigate to

Insufficient bandwidth, high packet loss, or a sluggish VPN connection.