ERROR_DS_CONSTRUCTED_ATT_MOD - 8475 (0x211B)
Modification of a constructed attribute is not allowed.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_DS_Constructed_Att_Mod with the numeric value 8475 and hexadecimal representation 0x211B indicates that an attempt was made to modify a constructed attribute in a directory service context. Constructed attributes are those derived from other attributes or generated based on specific rules, and they cannot be directly modified by operations intended for simple attributes.
Error Details
This error is encountered when the system detects an operation attempting to alter a constructed attribute, which is not permitted due to its nature as a derived value. Constructed attributes are typically used in directory services to provide additional information or computed values based on existing data, and modifying them directly would violate their intended design.
Usage Context
This error can occur in various scenarios where operations involving directory service objects (such as Active Directory) attempt to modify certain attributes that are inherently constructed. The specific context could involve administrative actions, synchronization processes, or any operation that involves attribute manipulation within the directory service framework.
Developer Interpretation
Developers should interpret this error code as a signal that an operation attempted to change a value of a constructed attribute, which is not allowed. This can be encountered when working with attributes such as msDS-AllowedToDelegateTo or other derived attributes in Active Directory. Developers must ensure that operations only modify simple or writable attributes and avoid any attempts to alter the values of constructed attributes.
Related Errors
- Error_DS_ATTRIBUTE_TYPE_UNDEFINED: Indicates an attempt to use a non-existent attribute type.
- Error_DS_ATT_NOT_DEF_IN_SCHEMA: Suggests that the attribute being modified is not defined in the schema, which could indirectly relate if the attribute is incorrectly identified as simple when it should be constructed.
FAQ
Q: What does this error mean?
A: This error indicates an attempt to modify a constructed attribute, which is not allowed. Constructed attributes are derived values and cannot be directly modified.
Q: How can I avoid this error?
A: Ensure that operations only modify simple or writable attributes and do not attempt to change the values of constructed attributes.
Summary
The ERROR_DS_Constructed_Att_Mod error code is a specific technical indicator in Windows directory service operations, signifying an attempt to modify a constructed attribute. Developers should be aware of this limitation when working with derived attributes within Active Directory or similar systems and ensure that only appropriate modifications are made.