http://www.bing.com:80/search?q=Authentication+API+Icon.pngSearch resultshttp://www.bing.com:80/s/a/rsslogo.gifhttp://www.bing.com:80/search?q=Authentication+API+Icon.pngCopyright © 2026 Microsoft. All rights reserved. These XML results may not be used, reproduced or transmitted in any manner or for any purpose other than rendering Bing results within an RSS aggregator for your personal, non-commercial use. Any other use of these results requires express written permission from Microsoft Corporation. By accessing this web page or using these results in any manner whatsoever, you agree to be bound by the foregoing restrictions.https://support.microsoft.com/en-us/authenticator/sign-in-using-microsoft-authenticatorSign 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.Fri, 03 Apr 2026 21:08:00 GMThttps://support.microsoft.com/en-us/authenticator/download-microsoft-authenticatorDownload Microsoft Authenticator Microsoft Authenticator is a mobile app that helps you sign in to all your accounts without using a password.Fri, 03 Apr 2026 10:16:00 GMThttps://support.microsoft.com/en-US/security/what-is-multifactor-authenticationWondering what multifactor authentication, sometimes known as two step verification, is? This article will explain it clearly.Fri, 03 Apr 2026 15:10:00 GMThttps://support.microsoft.com/en-us/authenticator/troubleshoot-problems-with-microsoft-authenticatorYou can resolve problems with Microsoft Authenticator by checking the tips in this article and reviewing some of the known errors.Fri, 03 Apr 2026 11:14:00 GMThttps://support.microsoft.com/en-us/account-billing/how-to-use-two-step-verification-with-your-microsoft-account-c7910146-672f-01e9-50a0-93b4585e7eb4About 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.Fri, 03 Apr 2026 11:14:00 GMThttps://support.microsoft.com/en-us/account-billing/sign-in-using-two-step-verification-or-security-info-1d8fd1e8-56a6-4e88-a06f-61a15824b604Set 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.Fri, 03 Apr 2026 09:12:00 GMThttps://support.microsoft.com/en-us/topic/protections-for-cve-2025-26647-kerberos-authentication-5f5d753b-4023-4dd3-b7b7-c8b104933d53In 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 ...Fri, 03 Apr 2026 04:19:00 GMThttps://support.microsoft.com/en-us/office/set-up-your-microsoft-365-sign-in-for-multi-factor-authentication-ace1d096-61e5-449b-a875-58eb3d74de14Learn how to set up your user account for multifactor authentication with Microsoft 365.Fri, 03 Apr 2026 19:06:00 GMThttps://support.microsoft.com/en-us/account-billing/microsoft-account-security-info-verification-codes-bf2505ca-cae5-c5b4-77d1-69d3343a5452Microsoft is committed to advancing security standards and as such, we will start phasing out SMS as a method of authentication and account recovery for personal Microsoft accounts.Fri, 03 Apr 2026 18:45:00 GMThttps://support.microsoft.com/en-us/office/modern-authentication-methods-now-needed-to-continue-syncing-outlook-email-in-non-microsoft-email-apps-c5d65390-9676-4763-b41f-d7986499a90dBasic Authentication interim experience Until September 16th, users signing into Outlook.com through Basic Authentication may experience recurring password prompts in Outlook and other third-party email applications.Thu, 02 Apr 2026 09:13:00 GMT