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• Using your default web browser, open the Microsoft 365 login page: https://portal.office.com
  
  

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  title Important
  If you see the Microsoft 365 portal below without signing in, then you are already signed in with with another Microsoft 365 account and you have to sign out first. After that, please click forget this account and sign back in: Image Removed Image Removed

   

  Sign in with your OST account:

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  Provide additional information to complete your registration. The easiest way is to have an SMS sent to your mobile phone:

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  Image RemovedRegistration is complete

  Account, click on your profil icon and choose Sign in with a different account Image Added

   

• Log in with your OST account access data, which you received in the Welcome to OST e-mail to your private e-mail address

  
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• Choose Next, install the Microsoft Authenticator app on your smartphone and then choose Next on your browser

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  title Alternatively you can set up SMS as default method
  Image Added How do I set up multi-factor authentication with SMS?

  
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• Open the Microsoft Authenticator app, click the plus Image Added, choose Work or school account, then Scan QR-Code, choose Next on your browser
  
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• Scan the QR-Code in your browser with your smartphone, the OST-Account will be added to the app and has to approved
  
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• Multifactor authentication has been successfully set up, click Next and then Done
  
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