Knowledge

ERROR_DS_LOCAL_CANT_HAVE_CROSSDOMAIN_LOCAL_MEMBER - 8520 (0x2148)

A local group cannot have another cross domain local group as a member.

Updated: Feb 21, 2026

Technical Background

This error code, ERROR_DS_LOCAL_CANT_HAVE_CROSSDOMAIN_LOCAL_MEMBER, indicates a specific limitation in the Windows Active Directory (AD) environment. It is encountered when attempting to add a cross-domain local group as a member of another local group within the same domain.

Error Details

The error 8520 or 0x2148 signifies that an operation was attempted which violates the AD schema and policy constraints. Specifically, it is not permissible for a local group to contain a cross-domain local group as one of its members. This restriction ensures consistency and integrity within the directory structure.

Common Causes

  • Incorrect Group Membership: Attempting to add a member from another domain (cross-domain) into a local group in the same domain.
  • Misconfigured Group Policy: Incorrect or conflicting settings in Group Policy Objects (GPOs) that enforce these constraints.
  • Schema Violation: The operation attempts to violate the AD schema rules, which define how groups can be structured.

Real-World Context

In a multi-domain Active Directory environment, where domains are separate and distinct from each other, this error ensures that group memberships adhere to domain boundaries. This is crucial for maintaining security and preventing unauthorized access across different domains.

Is This Error Critical?

Yes, this error can be critical as it directly impacts the integrity of the AD structure. It may prevent certain administrative actions or configurations from being applied correctly.

How to Diagnose

  1. Review Group Membership: Verify that all group members are within the same domain.
  2. Check GPO Settings: Ensure that no conflicting policies are in place that might allow cross-domain membership.
  3. Validate Schema Compliance: Confirm that the operation does not violate any AD schema rules.

How to Resolve

  1. Correct Group Membership: Remove or replace the cross-domain local group from the local group membership list.
  2. Adjust GPO Settings: Modify any relevant Group Policy settings to ensure they do not allow cross-domain memberships.
  3. Schema Compliance Check: Ensure that all operations comply with AD schema rules.

Developer Notes

When working with Active Directory, it is essential to understand the constraints and limitations imposed by the AD schema. Developers should carefully validate group membership and ensure compliance with domain boundaries to avoid encountering this error.

Related Errors

  • ERROR_DS_CROSS_DOMAIN_MEMBER_IN_LOCAL_GROUP: Another related error that indicates a similar violation but may involve different conditions or scenarios.

FAQ

Q: What does the error 8520 mean?

A: The error 8520 means that a local group cannot have another cross domain local group as a member, indicating a violation of AD schema rules.

Q: How can I prevent this error from occurring?

A: Ensure all group memberships are within the same domain and review any Group Policy settings to avoid conflicts. Always validate operations against AD schema constraints.

Summary

The ERROR_DS_LOCAL_CANT_HAVE_CROSSDOMAIN_LOCAL_MEMBER error (8520) is a specific constraint enforced by Active Directory to maintain integrity in multi-domain environments. Developers should be aware of this limitation and ensure that group memberships adhere to domain boundaries to avoid encountering this error.