Passkeys in Microsoft Entra ID Troubleshooting Guide (2026): Registration, Sign-In & Authenticator Fixes
Passkeys in Microsoft Entra ID keep failing over the same three things: Authenticator version, AAGUID allowlist, and Conditional Access. Here's the 2026 helpdesk runbook, with PowerShell diagnostics, cross-device QR fixes, and a passkey-vs-FIDO2-vs-Windows Hello comparison.