DNS_ERROR_DP_FSMO_ERROR - 9906 (0x26B2)
The operation failed because the domain naming master FSMO role could not be reached. The domain controller holding the domain naming master FSMO role is down or unable to service the request or is not running Windows Server 2003 or later.
Updated: Feb 21, 2026
Technical Meaning
The error code DNS_ERROR_DP_FSMO_ERROR with the numeric value 9906 and hexadecimal representation 0x26B2 indicates that a domain operation failed due to an inability to reach the domain naming master Flexible Single Master Operation (FSMO) role holder.
Error Details
This error typically occurs when a domain controller is unable to perform a task related to the domain naming process because it cannot communicate with the domain naming master FSMO role holder. The domain naming master FSMO role holder could be down, unable to service requests, or not running Windows Server 2003 or later.
Usage Context
This error can occur in various scenarios where a domain controller attempts to perform operations that require communication with the domain naming master FSMO role holder. Common operations include adding new domains, modifying domain trust relationships, and other tasks related to domain naming.
Developer Interpretation
Developers should interpret this error as an indication that the operation failed due to a network or service issue involving the domain naming master FSMO role holder. The specific context of the failure can vary depending on the operation being performed and the state of the domain controller and the FSMO role holder.
Related Errors
- DNS_ERROR_DS_NO_RID - Indicates that no relative identifier (RID) is available for a user or group.
- DNS_ERROR_DS_CSN_OLDER - The client's change number (CSN) is older than the server's CSN, indicating a replication issue.
FAQ
Q: What does DNS_ERROR_DP_FSMO_ERROR mean?
A: This error indicates that an operation failed because it could not reach the domain naming master FSMO role holder. The domain controller holding this role may be down or unable to service requests.
Q: How can I troubleshoot this issue?
A: Review the network connectivity and ensure that the domain controller hosting the domain naming master FSMO role is operational and running a supported version of Windows Server 2003 or later. Check for any network or service issues that might be preventing communication.
Summary
The DNS_ERROR_DP_FSMO_ERROR error code signifies an issue with reaching the domain naming master FSMO role holder during a domain operation. Developers should focus on ensuring proper network connectivity and verifying the operational state of the relevant domain controller to resolve this issue.