ERROR_DS_DUP_LDAP_DISPLAY_NAME - 8382 (0x20BE)
Schema update failed: duplicate LDAP display name.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_DS_DUP_LDAP_DISPLAY_NAME error indicates that a schema update operation failed because the LDAP display name being used is already in use within the directory service. This error typically occurs during attempts to modify or add entries in an Active Directory or similar directory service where unique display names are required.
Error Details
The numeric code 8382 and its hexadecimal representation 0x20BE uniquely identify this specific error condition. The error message provided is Schema update failed: duplicate LDAP display name, which clearly states the nature of the failure.
Usage Context
This error can occur in various scenarios where schema modifications are attempted, such as adding new attributes or modifying existing ones within an Active Directory environment. It highlights a violation of naming conventions that ensure uniqueness and consistency across directory entries.
Developer Interpretation
Developers should interpret this error as indicating a failure to update the schema due to a naming conflict. The presence of a duplicate LDAP display name is not allowed, and the operation must be corrected before it can proceed successfully. This error typically requires attention from administrators or developers responsible for managing directory services.
Related Errors
ERROR_DS_NAME_NOT_UNIQUE: A related error that might occur if the issue involves non-LDAP display names.ERROR_DS_OBJECT_CLASS_VIOLATION: Another potential error when schema modifications violate class definitions.
FAQ
Q: What does the ERROR_DS_DUP_LDAP_DISPLAY_NAME error mean?
A: It indicates that a duplicate LDAP display name was encountered during a schema update operation, preventing the modification from completing successfully.
Q: How can I resolve this issue?
A: Ensure that all LDAP display names are unique within the directory service. Review and correct any conflicting entries before retrying the schema update.
Summary
The ERROR_DS_DUP_LDAP_DISPLAY_NAME error is a specific technical condition encountered during Active Directory schema updates, where a duplicate LDAP display name was detected. Developers should address this by ensuring uniqueness in naming conventions to avoid such errors.