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  1. Download Microsoft Authenticator - Microsoft Support

    The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

  2. What is: Multifactor Authentication - Microsoft Support

    Wondering what multifactor authentication, sometimes known as two step verification, is? This article will explain it clearly.

  3. About Microsoft Authenticator - Microsoft Support

    This is called two-step verification or multi-factor authentication. As the only way to sign in - just tap an approval on your phone to sign in. This is called going passwordless. Just follow the …

  4. Protections for CVE-2025-26647 (Kerberos Authentication)

    Apr 8, 2025 · While in Audit mode, Event ID: 45 will be logged on the domain controller when it receives a Kerberos authentication request with an unsafe certificate. The authentication …

  5. How to add your accounts to Microsoft Authenticator

    If your organization supports two-factor verification or multi-factor authentication sign-in, you can set up your work or school accounts to use Authenticator as one of the verification methods.

  6. How to use two-step verification with your Microsoft account

    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.

  7. Modern Authentication Methods now needed to continue syncing …

    Jun 10, 2024 · If Outlook.com is not an option, you will want to contact the application's support to confirm that they support Modern Authentication against EAS, POP, IMAP, and SMTP. If the …

  8. Sign in using Microsoft Authenticator - Microsoft Support

    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.

  9. Fix NDR error "550 5.7.515" in Outlook.com - Microsoft Support

    Learn how to fix email issues for error code 5.7.515 when sending email to Outlook.com (the sending domain does not meet the required authentication level).

  10. "The server you are trying to access is using an authentication ...

    However, you receive the following error message: Unsupported server. The server you are trying to access is using an authentication protocol not supported by this version of Office. Solution A …