# Trace Active Directory replication Event ID 1925 attempt to establish a replication link failed due to DNS lookup problem > Use Active Directory replication Event ID 1925 attempt to establish a replication link failed due to DNS lookup problem to review this narrow operational decision without extending the source beyond its stated scope. - Canonical URL: https://update.dsesecurity.com/updates/trace-active-directory-replication-event-id-1925-attempt-to-establish-a-replication-link-failed-due/ - Publisher: Detection Systems & Engineering (DSE Security) - Author: DSE Security Editorial Team - Published: 2026-08-27T17:00:47+00:00 - Modified: 2026-08-27T17:33:25+00:00 - Last reviewed by DSE: 2026-08-27 - Resource type: Guide - DSE priority: Advisory - Topics: Cybersecurity, Microsoft 365 & Identity, Networks & Infrastructure - Reading time: 3 minutes ## What you need to know Use Active Directory replication Event ID 1925 attempt to establish a replication link failed due to DNS lookup problem to review this narrow operational decision without extending the source beyond its stated scope. ## Potentially affected Teams, systems, services, or facilities within the stated scope of Active Directory replication Event ID 1925 attempt to establish a replication link failed due to DNS lookup problem ## DSE recommendation Compare the observed state with the cited official source, document applicability and exceptions, and test any approved change with rollback safeguards. ## Article Use this document to connect an official requirement or behavior to observable evidence: Trace Active Directory replication Event ID 1925 attempt to establish a replication link failed due to DNS lookup problem. Only the official source and traced locations below supply facts. Confirm applicability before acting. ## Source fact: The official [Active Directory replication Event ID 1925 attempt to establish a replication link failed due to DNS lookup problem](https://learn.microsoft.com/en-us/troubleshoot/windows-server/active-directory/active-directory-replication-event-id-1925-dns-lookup) from Microsoft supports the following bounded statements: - At Introduction below H1, Microsoft states: “This article helps to resolve the issue where you get Event ID 1925 with the error message that DNS lookup failed, inbound replication of a directory partition has failed on the destination domain controller.” The research record locates this support at Introduction below H1. - At Introduction below H1, Microsoft states: “_Applies to:_ Windows Server (All supported versions) _Original KB number:_ 4469659.” The research record locates this support at Introduction below H1. Do not import neighboring assumptions into the source record. The supported task is a scoped comparison involving Active Directory objects, search bases, domain controllers, delegated roles, cmdlet parameters, and the DNS paths used to locate directory services and the conditions the source actually describes. ## What the source does not establish The cited page and retained statements do not establish the current state of any DSE or customer environment, prove that the documented configuration is applicable, or authorize a production change. Confirm supported versions, dependencies, and the current live source before use. It does not establish a deployment’s current state, authorize a production change, prove compliance, or show that Active Directory replication, Windows DNS, domain-controller location, time, network reachability, privileges, and protected credentials are healthy. Documented options are review inputs, not universal mandates. ## Applicability questions - For source statement 1 at Introduction below H1, which observable configuration, record, or test can confirm applicability here? - For source statement 2 at Introduction below H1, which observable configuration, record, or test can confirm applicability here? - Which owner can attest to the recorded state of Active Directory objects, search bases, domain controllers, delegated roles, cmdlet parameters, and the DNS paths used to locate directory services, including exceptions? - What baseline for Active Directory replication, Windows DNS, domain-controller location, time, network reachability, privileges, and protected credentials must accompany the source-specific observation? - Which success, stop, and escalation criteria are written before testing begins? ## DSE recommendation: DSE recommends using the cited source as the evidence anchor for this decision. Use a two-person review for the source interpretation and the resulting operational decision. Record the source location, examined part of Active Directory objects, search bases, domain controllers, delegated roles, cmdlet parameters, and the DNS paths used to locate directory services, observed and expected states, owner, and reason for deviation. If the review warrants change, use a bounded implementation with prerequisites, test population, monitoring, abort criteria, and a rehearsed reversal. Sequence checks for Active Directory replication, Windows DNS, domain-controller location, time, network reachability, privileges, and protected credentials and sanitize protected material before retention. ## Verification and evidence Keep the source locations Introduction below H1; Introduction below H1 adjacent to the sanitized artifacts used for comparison. Prefer sanitized command transcripts, parameter records, directory exports, authorization records, DNS locator tests, and before-and-after state, with enough identity and timing data for an independent recheck. Label this evidence set DSE-20260827-399 so observations, approvals, exceptions, and later rechecks cannot be substituted from another source review. Keep before-state evidence, approval, test or change result, exceptions, and after-state evidence together. Use an approved lab, window, or nonproduction path for risky tests. Set a recheck trigger for version, architecture, dependency, vendor, incident, or ownership change. A check proves only what was observed. ## Official references - [Active Directory replication Event ID 1925 attempt to establish a replication link failed due to DNS lookup problem](https://learn.microsoft.com/en-us/troubleshoot/windows-server/active-directory/active-directory-replication-event-id-1925-dns-lookup) — Microsoft ## Primary reference - Name: Active Directory replication Event ID 1925 attempt to establish a replication link failed due to DNS lookup problem - Authority: Microsoft Learn - URL: https://learn.microsoft.com/en-us/troubleshoot/windows-server/active-directory/active-directory-replication-event-id-1925-dns-lookup - Source publication date: Not stated by the source ## Citation and use Preferred citation: “Trace Active Directory replication Event ID 1925 attempt to establish a replication link failed due to DNS lookup problem,” DSE Security, https://update.dsesecurity.com/updates/trace-active-directory-replication-event-id-1925-attempt-to-establish-a-replication-link-failed-due/ Publishing principles: https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/ Usage and citation policy: https://update.dsesecurity.com/usage/ Copyright © 2026 Detection Systems & Engineering. 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