I Remote Desktop Connection Error Code 0x904 Better Jun 2026

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HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp Value: UserAuthentication = 0 (disable NLA, fallback to RDP security)

Users on Windows 11 (especially version 22H2 and later) frequently encounter this error when connecting via a computer name rather than an IP address. i remote desktop connection error code 0x904 better

If you are using an Azure VM, the issue is often a corrupt "MachineKeys" folder. Renaming C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys to MachineKeys_old and rebooting typically clears the error.

Better: Use openssl s_client to inspect server cert: Related search suggestions sent

The remote server uses self-signed certificates that don't always auto-renew. If they expire, the connection is instantly dropped after you enter credentials.

Unlike generic connection errors, . It occurs after TCP handshake but before user authentication . Unlike generic connection errors,

Before blindly applying registry hacks, let’s decode the error. Unlike generic “connection failed” messages, error 0x904 has specific roots in the .

In many cases, a simple restart of the remote computer resolves the issue, as it forces the system to regenerate temporary authentication keys.

Licensing issues often persist unless the licensing service is reset along with RDP.