{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-14T01:00:52.414Z",
  "record_id": "VXI-EXT-PROCUREMENT-PURVIEW-RETENTION-01-v1",
  "record_kind": "external_reference",
  "title": "Microsoft Purview: Retention depends on licences and policies",
  "system": "Microsoft Purview Audit",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does buying an audit licence preserve every existing Microsoft 365 audit record for longer?",
  "near_questions": [
    "Does buying an audit licence extend old records retrospectively?",
    "Which user needs the retention entitlement?",
    "Can a custom audit policy shorten a default duration?",
    "Do all record types receive the same retention?",
    "What evidence establishes policy priority?",
    "When is an audit item lifetime determined?",
    "Does a tenant subscription prove every user is covered?",
    "How should an agent review a claim of complete annual history?",
    "What happens when the relevant policy was introduced later?",
    "Can a current licence screenshot prove past retention?",
    "Can I save the scope of a Purview retention review?",
    "When should audit licensing evidence be renewed?"
  ],
  "supported_claims": [
    {
      "claim": "Microsoft ties audit retention to licensing, record coverage and policy priority. Custom policies can override defaults, and later changes do not update previously committed audit items. Verify the applicable identity, record type and policy at ingestion before claiming a complete extended history.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Verified buyer configuration or effective access rights",
    "Independent execution, completeness or security testing",
    "Vendor certification, legal compliance or guaranteed suitability"
  ],
  "public_summary": "Microsoft ties audit retention to licensing, record coverage and policy priority. Custom policies can override defaults, and later changes do not update previously committed audit items. Verify the applicable identity, record type and policy at ingestion before claiming a complete extended history.",
  "related_record_ids": [
    "VXI-EXT-PROCUREMENT-CLOUDTRAIL-COVERAGE-01-v1",
    "VXI-EXT-PROCUREMENT-AZURE-ACTIVITY-01-v1",
    "VXI-EXT-PROCUREMENT-GOOGLE-DATA-ACCESS-01-v1",
    "VXI-EXT-PROCUREMENT-VAULT-AUDIT-01-v1"
  ],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "Microsoft Purview audit retention licensing and policy priority",
    "source_url": "https://learn.microsoft.com/en-us/purview/audit-log-retention-policies",
    "checked_on": "2026-10-14",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-PURVIEW-RETENTION-01-v1",
    "candidate_record_sha256": "3f54a996379a9fa7f6973b0c338b67c2fec39aeb2c913a8fe0e4de45cf5c6706",
    "method": "Primary documentation reviewed for the published bounded statement.",
    "deployment_tested_by_varexis": false,
    "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "Microsoft ties audit retention to licensing, record coverage and policy priority. Custom policies can override defaults, and later changes do not update previously committed audit items. Verify the applicable identity, record type and policy at ingestion before claiming a complete extended history.",
    "required_buyer_context": "Identify audited user or entity, record type, event date, assigned licence and applicable retention policy.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
    "review_status": "documentation_review_only",
    "checked_on": "2026-10-14",
    "claim_to_check": "A premium audit purchase automatically extends all historical audit records.",
    "documented_statement": {
      "status": "documented",
      "statement": "Microsoft ties audit retention to licensing, record coverage and policy priority. Custom policies can override defaults, and later changes do not update previously committed audit items. Verify the applicable identity, record type and policy at ingestion before claiming a complete extended history.",
      "source_ids": [
        "purview"
      ]
    },
    "buyer_evidence_required": [
      "Licence assignment and audited identity for the relevant period",
      "Matching retention policies and their priorities",
      "Ingestion dates and available historical records"
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Do not promise retrospective retention or uniform coverage from a product licence alone."
    },
    "unknowns": "The buyer configuration, contract, effective entitlement and operational evidence have not been inspected. Missing evidence does not establish absence or failure of the feature.",
    "evidence_sources": [
      {
        "source_id": "purview",
        "url": "https://learn.microsoft.com/en-us/purview/audit-log-retention-policies",
        "final_url": "https://learn.microsoft.com/en-us/purview/audit-log-retention-policies",
        "title": "Microsoft Purview audit retention licensing and policy priority",
        "checked_on": "2026-10-14",
        "sha256": "2f63c9140a8a9403f57ebad16a332adaac4a2ff97cccd7791ec7034eecce320c",
        "bytes": 62157
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Procurement evidence support only; no supplier clearance, legal conclusion, configuration audit or verification of the buyer's claim is supplied.",
    "paid_value": {
      "decision_context": "Save the licence, policy and historical-scope questions used in an audit procurement decision.",
      "free": "Complete review, practical questions, sources and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Recheck policy priority, record categories and licence assignments."
    }
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#purview-audit-retention-license-check",
  "machine_readable_record": "/varexis-index/records/purview-audit-retention-license-check.json"
}