Knowledge

ERROR_DS_CANT_ACCESS_REMOTE_PART_OF_AD - 8585 (0x2189)

Could not access a partition of the directory service located on a remote server. Make sure at least one server is running for the partition in question.

Updated: Feb 21, 2026

Technical Background

This error, ERROR_DS_CANT_ACCESS_REMOTE_PART_OF_AD, indicates a failure to access a partition of the Active Directory (AD) directory service that is located on a remote server. This issue can arise in scenarios where AD partitions are distributed across multiple servers for load balancing or redundancy purposes.

Error Details

The error code 8585 (0x2189) signifies that there was an attempt to access a specific partition of the directory service, but this access could not be completed due to the absence of a running server responsible for managing that partition. This can happen if the required server is down or if network connectivity issues prevent communication with the remote server.

Common Causes

  • Server Unavailability: The server hosting the AD partition in question may be offline, undergoing maintenance, or experiencing hardware failures.
  • Network Issues: Poor network conditions between the client and the remote server can lead to failed connections.
  • Configuration Errors: Incorrect configuration of DNS or other networking settings might prevent proper communication with the remote server.

Real-World Context

In a multi-server AD environment, partitions are typically distributed across servers for load balancing. If one partition is not accessible due to the above causes, operations that require access to this partition will fail, leading to the ERROR_DS_CANT_ACCESS_REMOTE_PART_OF_AD error.

Is This Error Critical?

This error can be critical depending on the operation being performed and the importance of the data or service accessed through AD. If a critical operation such as user authentication or group membership lookup fails due to this error, it could impact the functionality of applications relying on AD for identity management.

How to Diagnose

  1. Review Operation Context: Determine which partition was being accessed and whether there are any known issues with that server.
  2. Validate Parameters: Ensure that the parameters passed during the operation are correct and valid.
  3. Confirm Object Types: Verify that the object types involved in the operation match expectations, as incorrect object types can lead to access failures.
  4. Verify Input Data: Check for any corrupted or invalid input data that might be causing the failure.
  5. Check Limits or Constraints: Ensure that no resource limits have been exceeded, such as too many concurrent operations on a partition.

How to Resolve

  1. Correct Parameter Usage: Double-check and correct any parameters used in the operation if they are found to be incorrect.
  2. Adjust Operation Context: If the server hosting the required partition is down or experiencing issues, wait for it to come back online or perform maintenance tasks as needed.
  3. Restore Data: In cases where data corruption might have caused the issue, restore from a backup if available.
  4. Retry Operation with Valid Inputs: Attempt the operation again using valid inputs and ensure that all prerequisites are met.

Developer Notes

Developers should be aware of the potential for this error in distributed AD environments and implement appropriate error handling mechanisms to manage such scenarios gracefully. This includes logging detailed information about failed operations, retrying operations under certain conditions, and providing user-friendly feedback when errors occur.

Related Errors

  • ERROR_DS_NO_RIDS_ALLOC_IN_TDS (8592): Indicates issues with RID allocation in the directory service.
  • ERROR_DS_DRA_SCHEMA_MISMATCH (1306): Occurs when schema mismatches are detected during replication operations.

FAQ

Q: What does this error mean?

A: This error indicates that a partition of the Active Directory directory service located on a remote server could not be accessed. Ensure at least one server is running for the partition in question.

Q: How can I prevent this error from occurring?

A: Regularly monitor and maintain AD servers, ensure proper network connectivity, and configure DNS settings correctly to avoid such issues.

Summary

The ERROR_DS_CANT_ACCESS_REMOTE_PART_OF_AD error is a specific technical issue related to the Active Directory directory service. It occurs when an attempt to access a partition on a remote server fails due to various potential causes. By understanding this error and implementing appropriate diagnostic and resolution strategies, developers can ensure more reliable operation of applications that rely on AD for identity management.