Office 365 now requires a sign-in to acquire a license associated with your user account.
When you go to sign in and activate office, use your UD email address and password
If you see the option to choose between Work or School account and Personal, the Work or School account should be selected
Your login page should end up having some UD branding
You will also be asked to use your Microsoft MFA code to verify your account.
If you see a prompt asking you to Use this Account everywhere, uncheck the option to manage the device.
If you notice the phone number associated with your account is not valid, please contact askit@udel.edu or call 302-831-6000 to get it updated.
Once you are signed in, all of the Office features will be enabled.