The self-signed RDP certificate on the remote server may have expired or become corrupt, preventing the secure handshake.
Check for custom RDP port:
Use the feature in the Azure Portal to rename the C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys folder and reboot the server. 5. Use the Microsoft Store RDP App 0x904 rdp
Document ID: IR-0x904-RDP-v1.0 Last updated: 2025-01-15 The self-signed RDP certificate on the remote server
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