# Capture ETW evidence for failing LDAP connections > Use Using ETW to troubleshoot LDAP connections to review this narrow operational decision without extending the source beyond its stated scope. - Canonical URL: https://update.dsesecurity.com/updates/capture-etw-evidence-for-failing-ldap-connections/ - Publisher: Detection Systems & Engineering (DSE Security) - Author: DSE Security Editorial Team - Published: 2026-08-27T12:14:16+00:00 - Modified: 2026-08-27T12:58:58+00:00 - Last reviewed by DSE: 2026-08-26 - Resource type: Playbook - DSE priority: Advisory - Topics: Business Continuity, IT, Microsoft 365 & Identity - Reading time: 3 minutes ## What you need to know Use Using ETW to troubleshoot LDAP connections 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 Using ETW to troubleshoot LDAP connections ## DSE recommendation Compare the observed state with the cited official source, document applicability and exceptions, and test any approved change with rollback safeguards. ## Article Keep this document to one review outcome: Capture ETW evidence for failing LDAP connections. Only the official source and traced locations below supply facts. Confirm applicability before acting. ## Source fact: The official [Using ETW to troubleshoot LDAP connections](https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/troubleshoot/troubleshoot-ldap-using-etw) from Microsoft supports the following bounded statements: - ETW can trace LDAP communications between Windows clients and LDAP servers, including AD DS domain controllers. The research record locates this support at Opening overview. - Microsoft documents how to start, stop, and scope the trace with trace flags. The research record locates this support at Sections: turn on ETW and start a trace; end a tracing session; Values for trace flags. These statements are the factual basis for this document. Do not extend them into a broader assurance. Review forest recovery plans, trusted backups, isolated recovery networks, controller rebuild order, credential resets, and validation steps only where the source and recorded environment align. ## What the source does not establish Collect only the duration and providers required for diagnosis, then secure or delete trace data under policy. A correct source interpretation can still be inapplicable to a particular design. Confirm offline credentials, Windows DNS, time, virtualization, storage, PKI, network isolation, and authorized recovery personnel, ownership, and change authority instead of treating documented behavior as a deployment guarantee. ## Applicability questions - For source statement 1 at Opening overview, which observable configuration, record, or test can confirm applicability here? - For source statement 2 at Sections: turn on ETW and start a trace; end a tracing session; Values for trace flags, which observable configuration, record, or test can confirm applicability here? - What inventory proves which parts of forest recovery plans, trusted backups, isolated recovery networks, controller rebuild order, credential resets, and validation steps are in and out of scope? - Which condition in offline credentials, Windows DNS, time, virtualization, storage, PKI, network isolation, and authorized recovery personnel must be healthy before evidence is trustworthy? - What result would disprove the working assumption and return the issue to the owner? ## DSE recommendation: DSE recommends using the cited source as the evidence anchor for this decision. Start with applicability, then compare the observed state with the cited source. Record the source location, examined part of forest recovery plans, trusted backups, isolated recovery networks, controller rebuild order, credential resets, and validation steps, observed and expected states, owner, and reason for deviation. An implementation decision needs an owner, approved window, prechecks, observable outcome, stop authority, and rollback path. Validate offline credentials, Windows DNS, time, virtualization, storage, PKI, network isolation, and authorized recovery personnel before and after the test, and store only sanitized operational evidence. ## Verification and evidence Build a reproducible chain from Opening overview; Sections: turn on ETW and start a trace; end a tracing session; Values for trace flags to the observed environment. Useful domain evidence includes backup manifests, restore logs, isolation proof, recovery timing, role-transfer records, DNS validation, and exercise findings; label every item with scope, timestamp, collector, and stable identifier. Record the decision even when no change is made, including uncertainty and the next trigger. Use safe testing conditions for disruptive work, preserve rollback proof, and revisit the conclusion after relevant platform, dependency, vendor, or ownership changes. ## Official references - [Using ETW to troubleshoot LDAP connections](https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/troubleshoot/troubleshoot-ldap-using-etw) — Microsoft ## Primary reference - Name: Using ETW to troubleshoot LDAP connections - Authority: Microsoft Learn - URL: https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/troubleshoot/troubleshoot-ldap-using-etw - Source publication date: 2019-11-22 ## Citation and use Preferred citation: “Capture ETW evidence for failing LDAP connections,” DSE Security, https://update.dsesecurity.com/updates/capture-etw-evidence-for-failing-ldap-connections/ 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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