Protections for CVE-2025-26647 (Kerberos Authentication)
Apr 8, 2025 · 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 …
Set up multi-factor authentication for Microsoft 365
Multi-factor authentication (MFA) helps you to access your accounts more securely. It's a way to prove that you are who you say you are. Because passwords can be forgotten, stolen, or compromised, …
Authentication did not complete - Microsoft Support
If you received an "Authentication did not complete" message it could be for one of the following reasons: App is locked: Make sure Microsoft Authenticator is unlocked on your device. Sometimes, …
Set up your Microsoft 365 sign-in for multi-factor authentication
Once your admin enables your organization, and your account, for multi-factor authentication (MFA) you have to set up your user account to use it. This should only take a minute or so.
What is: Multifactor Authentication - Microsoft Support
Wondering what multifactor authentication, sometimes known as two step verification, is? This article will explain it clearly.
Use a screen reader to set up and troubleshoot multifactor ...
Learn how to set up the sign-in for multifactor authentication and troubleshoot most common issues using a screen reader.
Kerberos and NTLM authentication failures due to duplicate SIDs
Aug 29, 2025 · Cause Windows updates released on and after August 29, 2025 include added security protections that enforce checks on SIDs, causing authentication to fail when devices have duplicate …
Modern Authentication Methods now needed to continue syncing …
Jun 10, 2024 · Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps
Outlook and other apps are unable to connect to Outlook.com when …
Last Updated: February 27, 2024 Issue Users signing into Outlook.com through Basic authentication may experience recurring password prompts in Outlook and other third-party email applications. This …
2-Step Authentication - Microsoft Support
To enable 2-step authentication/verification: Go to the Outlook.com website and log in. Select the gear icon. Go to Options > Account details (top of the list). You ...