ERROR_DS_MISSING_SUPREF - 8406 (0x20D6)
No superior reference has been configured for the directory service. The directory service is therefore unable to issue referrals to objects outside this forest.
Updated: Feb 21, 2026
Introduction
This article provides a detailed explanation of the ERROR_DS_MISSING_SUPREF error code, which is encountered in Windows Directory Services. The error indicates that no superior reference has been configured for the directory service, preventing it from issuing referrals to objects outside the current forest.
Technical Meaning
The ERROR_DS_MISSING_SUPREF error code (8406 or 0x20D6) is returned when a directory service operation requires a superior reference but none has been set up. This typically occurs in scenarios where the directory service needs to refer to objects that are outside its current forest, and no appropriate configuration exists.
Error Details
The error message states: 'No superior reference has been configured for the directory service. The directory service is therefore unable to issue referrals to objects outside this forest.' This implies that the operation being attempted involves cross-forest access or referral, which cannot be completed without a properly configured superior reference.
Usage Context
This error code can appear in various scenarios where cross-forest operations are required, such as when attempting to bind to an object located in another forest. It is important to ensure that the directory service has been correctly configured with necessary references and trust relationships to handle such operations.
Developer Interpretation
Developers should interpret this error code as indicating a configuration issue related to cross-forest referrals. The application or service attempting the operation must be properly configured to handle referrals across forests, which may involve setting up trust relationships between forests or configuring appropriate superior references within the directory service.
Related Errors
ERROR_DS_CROSS_DOMAIN_OPERATION_FAILED(8412)ERROR_DS_OBJECT_NOT_FOUND(32701)ERROR_DS_NO_RIDS_ALLOCINPOOL(8569)
FAQ
Q: What does the error code 8406 mean?
A: The error code 8406 indicates that no superior reference has been configured for the directory service, preventing it from issuing referrals to objects outside the current forest.
Q: How can I resolve this issue?
A: Ensure that the necessary trust relationships and superior references are set up between forests. Consult your network administrator or refer to Microsoft documentation on configuring cross-forest operations in Active Directory.
Summary
The ERROR_DS_MISSING_SUPREF error code (8406) is a generic reference indicating that no superior reference has been configured for the directory service, preventing it from issuing referrals to objects outside its current forest. Developers should ensure proper configuration and trust relationships are established to handle cross-forest operations.