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AD domain and forest functional levels

Timelines and exceptions · All guidance changes

Active Directory · Official Microsoft guidanceObserved changes retained

Observed content change

9 removed passages (about 70 words). The changed wording mentions dates and deadlines, prerequisites. Review the source to confirm the effect.

May need admin actionCheck whether new requirements apply to your setup; check the dates against your plans.

Requirement wordingDate or deadline wording
RemovedRaise domain and forest functional levels in Active Directory Domain Services
[removed: Note]
RemovedRaise domain and forest functional levels in Active Directory Domain Services
[removed: Access to this page requires authorization. You can try signing in or changing directories.]
RemovedRaise domain and forest functional levels in Active Directory Domain Services
[removed: Access to this page requires authorization. You can try changing directories.]
RemovedRaise domain and forest functional levels in Active Directory Domain Services
[removed: Applies to: ✅ Windows Server 2025, ✅ Windows Server 2022, ✅ Windows Server 2019, ✅ Windows Server 2016]
RemovedFeedback
[removed: Was this page helpful?]
RemovedFeedback
[removed: Need help with this topic?]
RemovedFeedback
[removed: Want to try using Ask Learn to clarify or guide you through this topic?]

Microsoft's wording from Microsoft source, © Microsoft Corporation, under CC BY 4.0. ChangeIntel marks removed and added words, drops formatting and shortens long unchanged stretches.

Read the current Microsoft source · Link to this observation · Compare any two versions

Sections to inspect

Up to 12 section headings from retained before/after evidence. The current source may have changed again.

Why this was flagged

The changed words, with a few words around them, matched these rule categories: dates and deadlines, prerequisites. These matches identify subjects to assess; they do not establish a policy change or applicability.

Observation details · observed 12 Oct 19:50 UTC
Observed by ChangeIntel
12 Oct 19:50 UTC
Source update metadata
3 Jul 17:40 UTC
First observed on this installation
5 Oct 17:50 UTC
Last successful check
today 20:15 UTC
Next check due
21 Oct 02:15 UTC

Observation time is not publication time, and a comparison does not establish an effective date. Full source bodies are not published; this page holds generated summaries, section headings and, as the page's license allows, Microsoft's changed wording. A documentation edit does not confirm feature availability in an environment.

Watch this page to review its changes in My radar.

Timeline

From the capture of 12 Oct 19:50 UTC

Requirements, exceptions and scope

  • GuidanceRequirementExceptionRecommendation4 conditions4 passages
    Functional levels determine the available Active Directory Domain Services (AD DS) domain or forest capabilities. Functional levels also determine which Windows Server operating systems you…
  • PrerequisitesRequirementScope1 condition4 passages

Extracted automatically from Microsoft's wording. Confirm dates, conditions and whether they apply to you in the source before acting; a month or quarter is a window, not a day.

How this timeline changed

Changes between ChangeIntel's readings of the page, between commits of its source file where Microsoft publishes it, in Internet Archive copies of pages that keep no other history, and entries from Microsoft's own change log (dated as Microsoft dates them). Edits between readings that neither records are unknown.

33 earlier changes
Observed history and review priority

Captured 12 Oct 19:50 UTC; extracted 16 Oct 16:10 UTC. Extractor: microsoft-1/9/fc65ebeb286710c0a830833db8a7e5de7e266b79981fe9c7c34479be9369ad3c.

Review priority. Previously extracted guidance is missing from a later capture · Extracted assertions require review · Applicability or exceptions require review

0 date changes and 0 condition changes across 1 compared revisions. Suggested check interval: 6 hours.

Earlier unavailable versions and edits between checks are unknown. A missing statement requires review; it does not mean the policy was cancelled. Recovered historical statements are not original revision snapshots.

Retained observations · 19

Compact evidence remains available after full document bodies expire. Earlier extractions can have different vocabulary or capture limitations.

Microsoft's edits

History on GitHub

Commits to the page's source in MicrosoftDocs/windowsserverdocs, with Microsoft's own messages. Commit dates can be hours or days before Learn publishes the change. ChangeIntel keeps a copy of each diff, so an edit stays readable here if GitHub stops serving it. Read 19 Oct 23:40 UTC.

  1. New article: Lower AD DS Domain and Forest Functional Levels (#8116) Served on LearnView diff
  2. updates View diff
  3. updates View diff
  4. Clarification that possible to auto raise DFL by raising FFL in all DC Server 25 View diff
  5. Removing special character View diff
  6. Fixing merge conflict View diff
  7. Bulk update to remove preview suffix View diff
  8. Removing local applies to for AD DS View diff
  9. Wording edit View diff
  10. Further edits View diff
  11. Further edits View diff
  12. Updates after feedback View diff
  13. Adding article to TOC View diff
  14. Removing extra space View diff
  15. Fixing build validation View diff
  16. Multiple edits View diff
4 metadata-only edits · author, dates or topic labels, no article text
  1. updates Metadata onlyView diff
  2. updates Metadata onlyView diff
  3. [Scoped] Bulk update author metadata Metadata onlyView diff
  4. Replace the non-skilling ms.authors Metadata onlyView diff

No related evidence found in this installation's recent collection. This does not establish that no announcement exists.

Retained observations

  • 12 Oct 19:50 UTC · shown above
  • 6 Oct 17:57 UTC

    Source metadata changed; retained article content is unchanged.

  • 5 Oct 17:50 UTC

    Baseline for retained history; no earlier retained text to compare.

What changed

First observed 18 Oct 2026

No field changes in the recorded history.

Cite this recorded revision to keep the same title, summary, facts and links when the page changes.

A day selects the latest observation by the end of that UTC day; today's selection can change until midnight. History starts when this installation records it.

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 20 Oct 21:54 UTC · 257 of 260 readable · 255 fully read · documentation 416/439 current

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