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When you first signed in to Office 365, you set up multi-factor authentication with SMS: How do I set up multi-factor authentication with SMS? We recommend After that, you also have to set up multi-factor authentication using the Microsoft Authenticator mobile app. This will allow you to access your account even if authentication via SMS does not work. Authentication via Once it has been set up, authentication via the mobile app is easier and, above all, more secure. |
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More TipsTip 1Store an alternative phone number (e.g. a family member's or partner's mobile phone number) as an additional authentication method. If you forget your smartphone, you can send the confirmation code to this number: How do I store an alternative phone number for multi-factor authentication? Tip 2We recommend adding a second factor for password recovery. If you lose your smartphone, you can use your private email address to reset your OST account: How do I store an alternative email address for password recovery? Tip 3Enable sign-in without a password in your Microsoft Authenticator app: How do I enable signing in to Office 365 without a password? Tip 4You can check, change or add to the stored security information here: Where can I change or add to the security check stored in Office 365? |