If you have existing School-Day account, please click Log In With Existing Account and use the email address associated to it to log in. Once logged in if you wish you can update your account to use the 'Sign in with Microsoft' feature by following the instructions here.
If you do not have an existing School-Day account, please click Create New Account.Create New Account
Please ensure that the Microsoft Login Window is not already open and try again. If the issue persists please contact School-Day support at support.school-day.com
Please locate the Microsoft pop up window to complete sign in.