Code 0x904 Install |link| | I Remote Desktop Connection Error

The installed Remote Desktop app is not compatible with the server version.

Before diving into the fix, it is helpful to know what causes it:

3. Grant Network Service Read Permissions to the Private Key

: Download the latest Microsoft Remote Desktop client from the Microsoft Store. Step-by-Step Troubleshooting Guide 1. Verify Remote Desktop Settings (Host PC) i remote desktop connection error code 0x904 install

This is a deep-dive technical article designed to troubleshoot and resolve Remote Desktop Protocol (RDP) Error Code , specifically focusing on the scenarios where it interrupts installation, connection setup, or remote software deployment.

A: Extended error 0x7 often accompanies 0x904 when the connection is lost after successful authentication. It typically points to network instability, a VPN timeout, or an issue with the Remote Desktop Services configuration on the host.

If you cannot change the server certificate (e.g., connecting to a legacy machine), you must tell the client to ignore the error. The installed Remote Desktop app is not compatible

The host's self-signed RDP certificate has passed its expiration date and failed to auto-renew. Immediate rejection of the TLS handshake.

: Windows auto-generates certificates to encrypt RDP traffic. If these expire or corrupt silently, the server drops the TLS tunnel.

0x900 (ERROR_INVALID_PARAMETER) + 0x4

Windows Defender Firewall often blocks incoming remote connections by default.

If you encounter this error while trying to connect to an Azure Virtual Machine, a locked or corrupt MachineKeys folder may prevent the Remote Desktop service from properly accessing or creating cryptographic keys.

This comprehensive guide will demystify error 0x904, explaining why it happens even after a correct RDP installation, and provide you with a systematic, step-by-step process to diagnose and resolve it. Step-by-Step Troubleshooting Guide 1

When an RDP session attempts to negotiate licensing and the local license store ( %WinDir%\System32\MSLicensing ) is missing or write-protected, Windows tries to "install" the licensing module on the fly. Failure to write MSLicensing.reg or mslicensing.dll triggers 0x904 .