Signing In to Microsoft 365 for the First Time

The University of Dayton transitioned from Office 2021 to Microsoft 365 to ensure continued access to the latest features, security updates, and support.

To sign in to Microsoft 365 for the first time, follow these instructions.

1. Once Microsoft 365 is installed, open any of the Office applications (Word,PowerPoint, Excel, etc.) to start the activation process. 
    
2. Click the Sign in or create an account link.
   
   
    
3. Enter your UD email address and click Next.
   
   
    
4. If you are prompted because your UD email was used for a personal Microsoft account, click the Work or school account link.
   
   
    
5. Sign in with your UD credentials and complete your 2FA authentication.
    
6. When the Sign in to all apps... message appears, click No, this app only.