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

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NLA requires the client to authenticate before a full RDP session is created. If the client OS (e.g., Windows 7, older Windows 10 build) or RDP client (Microsoft Remote Desktop for Mac) does not support the NLA version required by the host, error 0x904 + 0x7 appears. Error 0x904 with extended error 0x7 generally points

Error 0x904 with extended error 0x7 generally points to a failure early in the RDP connection establishment—most often networking, name resolution, firewall/port blocking, or an authentication/TLS handshake issue. Systematic diagnostics—connectivity tests, port checks, DNS validation, log inspection, and isolating client vs server vs network—quickly narrow the root cause. Remediations focus on restoring network reachability, aligning security/NLA settings, fixing certificates, and ensuring correct firewall/NAT rules. Following the structured steps above typically restores successful RDP connections and reduces recurrence risk. aligning security/NLA settings

Ping the remote server's IP address to check for packet loss. 2. Check Remote Desktop Gateway Settings and ensuring correct firewall/NAT rules.

Even if RDP appears enabled, verify that both "Remote Desktop" and "Remote Desktop (WebSocket)" are allowed through the firewall for both Private and Public profiles.

Restart the service to generate a new one: Open Command Prompt as Admin and run: net stop termservice then net start termservice .