If you sign-in issue persists, see How to troubleshoot being unable to sign in to Skype for Business or Configure connection settings manually.
If you need to, choose Change date and time and update your computer's clock. Go to Control Panel > Date and Time, and note the UTC offset for your location.
If the password reset site doesn't work for you, contact your workplace tech support team directly. If you've forgotten your password or it's no longer working, use the Microsoft Online Password Reset site to request a new password from your workplace technical support team- typically the people who set up your account for you.
If you're able to successfully sign in to Microsoft 365 Web Scheduler, try signing in again with the same type of or you able to sign in? Sign in with your corrected sign-in address