# Review Active Directory Forest Recovery - Prerequisites before AD/DNS changes > Use Active Directory Forest Recovery - Prerequisites to review this narrow operational decision without extending the source beyond its stated scope. - Canonical URL: https://update.dsesecurity.com/updates/review-active-directory-forest-recovery-prerequisites-before-ad-dns-changes/ - Publisher: Detection Systems & Engineering (DSE Security) - Author: DSE Security Editorial Team - Published: 2026-08-27T17:06:26+00:00 - Modified: 2026-08-27T17:11:09+00:00 - Last reviewed by DSE: 2026-08-27 - Resource type: Playbook - DSE priority: Advisory - Topics: Cybersecurity, Microsoft 365 & Identity, Networks & Infrastructure - Reading time: 3 minutes ## What you need to know Use Active Directory Forest Recovery - Prerequisites 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 Forest Recovery - Prerequisites ## 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: Review Active Directory Forest Recovery – Prerequisites before AD/DNS changes. Only the official source and traced locations below supply facts. Confirm applicability before acting. ## Source fact: The official [Active Directory Forest Recovery – Prerequisites](https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/forest-recovery-guide/ad-forest-recovery-prerequisites) from Microsoft supports the following bounded statements: - At Introduction below H1, Microsoft states: “The following document discusses prerequisites that you should be familiar with before devising a forest recovery plan or attempting a recovery.” The research record locates this support at Introduction below H1. - At Assumptions, Microsoft states: “You have worked with a Microsoft Support professional and: Determined the cause of the forest-wide failure.” The research record locates this support at Assumptions. Only the traced statements above are asserted as source facts. Apply the review to forests, domains, controllers, directory partitions, trusts, sites, replication links, service accounts, and delegated roles after confirming that the source and deployed context match. ## 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. The citation is not a substitute for observed state, authorization, compliance evidence, or dependency health. Examine Windows DNS, time synchronization, network reachability, PKI, backups, virtualization safeguards, and privileged identity before translating the source into an operational decision. ## 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 Assumptions, which observable configuration, record, or test can confirm applicability here? - Within forests, domains, controllers, directory partitions, trusts, sites, replication links, service accounts, and delegated roles, which versions, roles, and configuration states define the review population? - Could Windows DNS, time synchronization, network reachability, PKI, backups, virtualization safeguards, and privileged identity invalidate the test, hide a failure, or change applicability? - Who owns the decision, and which observation requires stopping, escalation, or rollback? ## DSE recommendation: DSE recommends using the cited source as the evidence anchor for this decision. Begin by recording scope and current state before deciding whether a change is warranted. Record the source location, examined part of forests, domains, controllers, directory partitions, trusts, sites, replication links, service accounts, and delegated roles, observed and expected states, owner, and reason for deviation. For an approved change, define prerequisites, a limited test path, success and stop conditions, monitoring, and rollback. Check Windows DNS, time synchronization, network reachability, PKI, backups, virtualization safeguards, and privileged identity in design order. Protect credentials, keys, recovery material, personal data, and sensitive topology in evidence. ## Verification and evidence Build a reproducible chain from Introduction below H1; Assumptions to the observed environment. Useful domain evidence includes directory and policy exports, replication and locator tests, event logs, trust state, role ownership, and controlled authentication tests; label every item with scope, timestamp, collector, and stable identifier. Label this evidence set DSE-20260827-060 so observations, approvals, exceptions, and later rechecks cannot be substituted from another source review. Preserve both successful and failed observations, along with approval and rollback evidence. Avoid uncontrolled production experiments. Assign an expiry or event-driven recheck so the conclusion is not treated as permanent. ## Official references - [Active Directory Forest Recovery – Prerequisites](https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/forest-recovery-guide/ad-forest-recovery-prerequisites) — Microsoft ## Primary reference - Name: Active Directory Forest Recovery - Prerequisites - Authority: Microsoft Learn - URL: https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/forest-recovery-guide/ad-forest-recovery-prerequisites - Source publication date: Not stated by the source ## Citation and use Preferred citation: “Review Active Directory Forest Recovery - Prerequisites before AD/DNS changes,” DSE Security, https://update.dsesecurity.com/updates/review-active-directory-forest-recovery-prerequisites-before-ad-dns-changes/ 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. All rights reserved.