{
  "doc_id": "KB-O365-IMPOSSIBLE-TRAVEL",
  "doc_type": "kb",
  "title": "Interpreting O365 Impossible Travel Alerts",
  "scenario": "o365_suspicious_login",
  "summary": "Guidance for validating impossible travel alerts, including VPN, proxy, and approved travel false-positive conditions.",
  "applicability": ["azuread_impossible_travel"],
  "key_points": ["Impossible travel must be validated against user travel context.", "VPN egress and cloud proxy routing are common false-positive sources.", "Pair sign-in anomaly with MFA, mailbox, or device anomalies before concluding compromise."],
  "investigation_guidance": ["Validate source ASN and IP history.", "Check user-approved travel or remote work context.", "Compare device ID and user agent consistency."],
  "decision_points": ["User denial of travel plus new device strongly increases confidence.", "Approved travel and trusted VPN topology reduce confidence."],
  "related_entities": {"ttps": ["T1078"], "iocs": []},
  "related_refs": {"playbooks": ["PB-O365-LOGIN-001"], "cases": []},
  "tags": ["kb", "o365", "impossible-travel"],
  "updated_at": "2026-04-10T09:30:00+08:00"
}