DNS_ERROR_NOT_ALLOWED_ON_RODC - 9569 (0x2561)
The operation requested is not permitted on against a DNS server running on a read-only DC.
Updated: Feb 21, 2026
Introduction
This article provides a detailed technical explanation of the DNS_ERROR_NOT_ALLOWED_ON_RODC error code, including its meaning and usage context. The error indicates that an operation requested on a DNS server is not permitted when running on a read-only domain controller (RODC).
Technical Background
The Domain Name System (DNS) service in Windows operates with various permissions and capabilities depending on the type of domain controller it runs on. A read-only domain controller (RODC) is designed to store only a subset of Active Directory data, primarily for read operations, which limits its operational capabilities compared to a writable domain controller.
Error Details
The DNS_ERROR_NOT_ALLOWED_ON_RODC error code (9569, 0x2561) signifies that the operation requested is not supported or allowed on a DNS server running on an RODC. This typically occurs when attempting to perform write operations, such as adding, modifying, or deleting DNS records.
Common Causes
- Unsupported Operation: The operation attempted is not supported by RODCs due to their read-only nature.
- Incorrect Usage Context: Attempting a write operation on an RODC where only read operations are permitted.
Real-World Context
RODCs are commonly used in environments where the risk of compromise is high, and it is necessary to limit the amount of writable data stored. By design, RODCs do not support write operations, which can lead to this error when such an operation is attempted.
Is This Error Critical?
The criticality of this error depends on the specific operation being performed. If a write operation is required, it may be necessary to use a writable domain controller instead of an RODC. However, if read-only operations are expected, this error should not cause significant issues.
How to Diagnose
- Review Operation Context: Ensure that the operation being performed is appropriate for the type of domain controller it is running on.
- Validate Parameters: Verify that all parameters passed to the DNS service are valid and correctly formatted.
- Confirm Object Types: Check if the object types involved in the operation (e.g., DNS records) are compatible with RODCs.
How to Resolve
- Correct Parameter Usage: Ensure that only read operations are performed on an RODC, as these are supported.
- Adjust Operation Context: If a write operation is necessary, use a writable domain controller instead of an RODC.
- Restore Data: In cases where data corruption or invalid state might be the cause, restore from a backup if available.
Developer Notes
Developers should ensure that their applications and scripts are aware of the limitations imposed by RODCs and handle them appropriately to avoid encountering this error.
Related Errors
DNS_ERROR_RECORD_DOES_NOT_EXISTDNS_ERROR_NAME_DOES_NOT_EXISTDNS_ERROR_NO_SUCH_DOMAIN
FAQ
Q: Can I perform write operations on an RODC?
A: No, RODCs are designed for read-only operations only. Attempting a write operation will result in the DNS_ERROR_NOT_ALLOWED_ON_RODC error.
Q: How can I determine if my domain controller is an RODC?
A: You can check the role of your domain controllers using tools like dcdiag or by reviewing Active Directory site and domain information.
Summary
The DNS_ERROR_NOT_ALLOWED_ON_RODC error code indicates that a write operation was attempted on a DNS server running on an RODC, which is not supported. Developers should ensure their applications respect the limitations of RODCs to avoid this error.