Open and run the following command to restart the RDP environment: net stop termservice /y && net start termservice Use code with caution.
The first check is to ensure the remote computer is configured to accept RDP connections. The setting can occasionally revert after major Windows updates.
To effectively troubleshoot, one must first understand what the codes mean.
To understand the error, one must first translate the machine’s language. Error code 0x904 resides in the RDP licensing subsystem. In essence, it signifies that the Remote Desktop Session Host (the server) cannot accept a connection because the client computer is either using an invalid license or the licensing process has failed due to a protocol mismatch or a missing license server. However, this code rarely appears alone.
