ERROR_DS_INVALID_SEARCH_FLAG_SUBTREE - 8626 (0x21B2)
The search flags for the attribute are invalid. The subtree index bit is valid only on single valued attributes.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_DS_INVALID_SEARCH_FLAG_SUBTREE indicates that the search flags used in a directory service operation are invalid. Specifically, it points out that the subtree index bit is being used on an attribute that does not support this flag.
Error Details
This error typically occurs during operations involving Active Directory or similar directory services where search flags are incorrectly specified. The error message highlights that the subtree index bit (a specific type of search flag) should only be applied to single-valued attributes, which means it is invalid when used on multi-valued attributes.
Usage Context
This error code is relevant in scenarios involving directory service operations such as searches or queries where specific flags are used to modify the behavior of the operation. It is particularly pertinent for developers working with Active Directory services and related APIs.
Developer Interpretation
When encountering this error, it indicates that there is a misconfiguration or misuse of search flags in your code. Specifically, you should ensure that the subtree index bit is only used on attributes that are single-valued. This can be achieved by validating the attribute type before applying any search flags.
Related Errors
ERROR_DS_NO_SUCH_OBJECT(0x80072030): Indicates that the object being searched for does not exist.ERROR_DS_ATT_NOT_DEF_IN_SCHEMA(0x80072054): Indicates that an attribute is not defined in the schema.
FAQ
Q: What causes this error?
A: This error occurs when invalid search flags are used, specifically when the subtree index bit is applied to a multi-valued attribute. Ensure that all attributes being queried support the specified flags.
Q: How can I resolve this issue?
A: Verify that the attributes you are querying support the search flags you are using. Use appropriate validation logic to ensure that single-valued attributes only receive the subtree index bit flag.
Summary
ERROR_DS_INVALID_SEARCH_FLAG_SUBTREE is a specific error code indicating an invalid use of search flags in directory service operations. It highlights the importance of correctly specifying and validating attribute types when performing searches or queries. Developers should pay attention to this error to ensure their applications handle attributes appropriately.