Insufficient bandwidth, packet loss, or slow VPN connections.
To keep your remote connections stable, consider these maintenance tips: Unable to RDP into some Windows Servers - Error code: 0x904
The root cause of error 0x904 often lies in , unstable network paths , or misconfigured firewall rules . Quick Fixes and Workarounds remote desktop connection error code 0x904
Expired or corrupt self-signed RDP certificates on the target server.
| Error Code | Description | |------------|-------------| | 0x904 | User not authorized for RDP | | 0x516 | RDP disabled or network issue | | 0x7e | Access denied (generic) | Insufficient bandwidth, packet loss, or slow VPN connections
Open Command Prompt as Administrator and restart the service to generate a new certificate: net stop termservice net start termservice Use code with caution.
Log into the affected machine locally or via an alternative tool. Press Win + R , type certlm.msc , and hit Enter. Navigate to > Certificates . Check for expired certificates. If found, delete them. | Error Code | Description | |------------|-------------| |
The most frequent culprit. Windows security policies require a user to have explicit permission to log in via RDP. If you are using a local account (not an Administrator) or a domain account without this right, you will see 0x904.
The simplest cause of Error 0x904 is a typo. Ensure that the computer name or IP address you are entering in the Remote Desktop Connection client is correct.
Locate the certificate, check its expiration date, and it if expired.