Search for in the Start menu. Click Change settings .
Sometimes, Network Level Authentication (NLA) or encryption mismatches cause the 0x904 error. On the remote host, open . Search for in the Start menu
Ensure both and Remote Desktop (WebSocket) are checked for Private and Public networks. On the remote host, open
Check the expiration date of the certificate. If it is expired, right-click and it. If it is expired, right-click and it
Click , browse to C:\Windows\System32\mstsc.exe , and add it to the list. 4. Adjust Security Layers (NLA Issues)
Insufficient bandwidth, high packet loss, or a sluggish VPN connection.
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