Access the VM via the Azure Portal and select Run command > RunPowerShellScript .
Error 0x904 is frequently linked to "dodgy" or unstable network paths, especially over VPNs.
Reboot the server. This forces the system to recreate the necessary key folders. 3. Verify Firewall and Security Settings i remote desktop connection error code 0x904 install
A misconfigured firewall can block the TLS handshake necessary for the connection.
If the connection still fails, you can try lowering the security requirements via Group Policy. Navigate to Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Security and set the "Security Layer" to RDP . 5. Alternative Connection Tools Access the VM via the Azure Portal and
Check the expiration date. If expired, right-click and Delete the old certificate.
Open Command Prompt as Administrator and run: restart-service termserv -force . This forces the system to recreate the necessary key folders
Expired self-signed certificates are a primary cause of error 0x904. Windows generates these for RDP connections, but they do not always renew automatically.
Ensure your VPN provides sufficient bandwidth and isn't dropping packets.
If you encounter this error on an Azure Virtual Machine, the certificate store might be corrupt.
