ERROR_NO_LOGON_SERVERS - 1311 (0x51F)
There are currently no logon servers available to service the logon request.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_NO_LOGON_SERVERS error code, with the numeric value of 1311 and the hexadecimal representation of 0x51F, signifies that a logon request could not be serviced due to the absence of available logon servers. This error typically occurs in scenarios where user authentication is required but no suitable server resources are present.
Error Details
This error code is specific to authentication and logon processes within the Windows operating system. It indicates that the system attempted to authenticate a user or service, but encountered a situation where there were no available servers capable of processing the request. This could be due to various reasons such as network connectivity issues, server downtime, or misconfiguration.
Usage Context
The ERROR_NO_LOGON_SERVERS error is commonly observed in environments where multiple logon servers are configured for redundancy and failover purposes. In such setups, if all the designated logon servers are unavailable, this error will be returned to indicate that no server can process the authentication request.
Developer Interpretation
Developers should interpret this error as an indication of a failure in the authentication process due to the unavailability of necessary resources. This error does not provide specific details about which logon servers were unavailable or why they are down, but it is crucial for diagnosing and resolving issues related to user access and authentication.
Related Errors
ERROR_LOGON_SERVER_CONFLICT(1324, 0x52C): Indicates a conflict in the logon server configuration.ERROR_NO_SUCH_LOGON_SESSION(1368, 0x558): Suggests that no session exists for the specified user or service.
FAQ
Q: What does the ERROR_NO_LOGON_SERVERS error mean?
A: It indicates that there are currently no available logon servers to process a logon request, typically due to server unavailability or network issues.
Q: How can I resolve this issue?
A: Ensure that all designated logon servers are operational and accessible. Check the network connectivity and configuration settings for any misconfigurations.
Summary
The ERROR_NO_LOGON_SERVERS error code is a generic indication of an authentication failure due to unavailability of necessary resources. Developers should focus on ensuring the availability and proper configuration of logon servers in their environments to prevent this issue from occurring.