Sign in using Microsoft Authenticator | Microsoft Support Sign in using Microsoft Authenticator Microsoft Authenticator helps you sign in to your accounts if you've forgotten your password, use two-step verification or multi-factor authentication, or have gone passwordless on your account
Protections for CVE-2025-26647 (Kerberos Authentication) In this article Summary Take Action altSecID attributes Timeline of changes Registry Settings Audit Events Event ID: 45 Event ID: 21 Known issue Summary The Windows security updates released on or after April 8, 2025, contain protections for a vulnerability with Kerberos authentication This update provides a change in behavior when the issuing authority of the certificate used for a security
How to use two-step verification with your Microsoft account About two-step verification and authentication for Microsoft accounts What is two-step verification in Microsoft accounts? Two-step verification (sometimes called multi-factor authentication) helps protect you by making it more difficult for someone else to sign in to your Microsoft account
Sign in using two-step verification or security info Set up security info to use an authentication app Set up security info to use text messaging Set up security info to use a phone call Set up security info to use a security key Sign in using an authenticator app notification on your mobile device Sign in to your account with your username and password