Remote Desktop Connection Error Code 0x904 Extended Error Code 0x7 -
To fix a problem, you must understand it.
When combined, these errors tell a clear story: Your RDP client and server cannot complete a TLS handshake. The server may support only older, insecure protocols (like RDP Security Layer instead of TLS 1.0/1.1/1.2), or a network device is interfering with the encrypted traffic. To fix a problem, you must understand it
On the server (via console or remote PowerShell if possible): When combined, these errors tell a clear story:
Open gpedit.msc в†’ Computer Configuration в†’ Admin Templates в†’ Windows Components в†’ Remote Desktop Services в†’ Remote Desktop Session Host в†’ Security в†’ Require use of specific security layer for remote (RDP) connections в†’ Set to Negotiate or RDP. On the server (via console or remote PowerShell
Then restart TermService:
net stop TermService & net start TermService
Microsoft patched a CredSSP vulnerability in 2018. If the RDP host has the “Force updated clients” or “Mitigated” group policy setting, but the client is not patched or has an older setting, authentication fails with extended code 0x7.
If the services are stuck, the host will not accept new connections, resulting in extended error 0x7.
