OfficeHome sign-in failures with error 90014 indicating AiTM nonce omission

Duo Tech@duotech

•updated Aug 10, 2026•2•0•11

Detects OfficeHome sign-ins with error 90014 (nonce omission) followed by anomalous successful sign-ins from a different IP, or repeated 90014 failures, consistent with AiTM token replay activity.