NTLMv1 SSO enforcement phases
Timelines and exceptionsTimeline
From the capture of 12 Oct 19:19 UTC · an earlier observation- 4 dates
- 2 undated sections
- 4 with conditions
- Audit / monitorAugust 2025 Published timing is qualified; effectiveness is not confirmed.
- Audit / monitorand later; update release September 2025 Published timing is qualified; effectiveness is not confirmed.
- November 2025 Published timing is qualified; effectiveness is not confirmed.
- Enforced by defaultOctober 2026 Published timing is qualified; effectiveness is not confirmed.
- 13 months agomonth windowlateAudit / monitor · unconfirmed
- 12 months agomonth windowupdate release · Patch Tuesday 9 Sep 2025Audit / monitor · unconfirmed
- Rollout of changesMilestone
- 10 months agomonth window
- this window includes todaymonth windowEnforced by default · unconfirmed
BlockNTLMv1SSOBlockNtlmv1SSO
Settings and overrides named on this page
Registry values, policies and cmdlets the source mentions, with the dated steps that name them. Read the source for the values to set.
BlockNTLMv1SSOOverrideOctober 2026BlockNtlmv1SSOOverrideOctober 2026Credential Guard
Requirements, exceptions and scope
Credential GuardCredential Guard
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.
Observed history and review priority
Captured 12 Oct 19:19 UTC; extracted 16 Oct 16:10 UTC. Extractor: microsoft-1/9/fc65ebeb286710c0a830833db8a7e5de7e266b79981fe9c7c34479be9369ad3c.
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 · 3
Compact evidence remains available after full document bodies expire. Earlier extractions can have different vocabulary or capture limitations.
- 20 Oct 07:19 UTC · 25 candidates
- 19 Oct 00:53 UTC · 23 candidates
- 12 Oct 19:19 UTC · 8 candidates