Recorded 20 Oct 2026 at 07:20 UTC. The last complete observation on or before 20 Oct 2026 (UTC). This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.
Guidance timelinesupport.microsoft.com
NTLMv1 SSO enforcement phases
Microsoft's guidance publishes 8 dates, from 2025 to 19 Oct 2026 (References).
What it said
- Rollout of changes
- 2025
- Background
- August 2025 · Audit / monitor
- Rollout of changes (2)
- September 2025 or later · Audit / monitor
- Begin rollout of changes to Windows Server 2025
- November 2025
- Changes
- October 2026 · Enforced by default, conditional
- Introduction
- 13 Oct 2026 or later · Enforced by default, conditional
- References
- 14 Oct 2026 · Enforced
- References (2)
- 19 Oct 2026
- Settings named
- BlockNtlmv1SSO, BlockNTLMv1SSO, Credential Guard, MS-CHAPv2, Sign-On, Wi-Fi, EAP-MSCHAPv2, PEAP-MSCHAPv2
- Timeline
- No longer listed in this observation. Previously: August 2025 · Audit / monitor, tentative
Recorded links
What changed
First observed 18 Oct 2026- 20 Oct 2026 References (2)19 Oct 2026
- 20 Oct 2026 IntroductionOctober 2026 · Enforced by default, conditional → 13 Oct 2026 or later · Enforced by default, conditional
- 20 Oct 2026 Changes13 Oct 2026 · Enforced by default, conditional → October 2026 · Enforced by default, conditional
- 20 Oct 2026 SummaryMicrosoft's guidance publishes 7 dates, from 2025 to 14 Oct 2026 (References). → Microsoft's guidance publishes 8 dates, from 2025 to 19 Oct 2026 (References).
- 19 Oct 2026 TimelineAugust 2025 · Audit / monitor, tentative → No longer listed in this observation. Previously: August 2025 · Audit / monitor, tentative
- 19 Oct 2026 Settings namedBlockNTLMv1SSO, BlockNtlmv1SSO, Credential Guard → BlockNtlmv1SSO, BlockNTLMv1SSO, Credential Guard, MS-CHAPv2, Sign-On, Wi-Fi, EAP-MSCHAPv2, PEAP-MSCHAPv2
- 19 Oct 2026 References14 Oct 2026 · Enforced
- 19 Oct 2026 Changes13 Oct 2026 · Enforced by default, conditional
- 19 Oct 2026 IntroductionOctober 2026 · Enforced by default, conditional
- 19 Oct 2026 Begin rollout of changes to Windows Server 2025November 2025, tentative → November 2025
- 19 Oct 2026 Rollout of changes (2)October 2026 · Enforced by default, tentative, conditional → September 2025 or later · Audit / monitor
- 19 Oct 2026 BackgroundAugust 2025 · Audit / monitor
Show 2 more recent changes
- 19 Oct 2026Rollout of changes September 2025 or later · Audit / monitor → 2025
- 19 Oct 2026Summary Microsoft's guidance publishes 4 dates, from August 2025 to October 2026 (Rollout of changes). → Microsoft's guidance publishes 7 dates, from 2025 to 14 Oct 2026 (References).
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