Hi,
Please check if there is an alternative way to sign in on the Sign-in page or on the password screen. If such an option is available, please attempt another method to complete the sign-in. Also, try using another browser, device, or network like mobile data.
If you can sign in, or if the account is already signed in on a different device, please change your sign-in preference.
If this option is not available, please attempt to sign in again after 24 hours. Avoid making login attempts during these 24 hours. To ensure sufficient waiting time, it is recommended to extend the pause slightly. I also suggest trying to access your account using other devices or networks, such as mobile data.
If you still experience the same issue after 24 hours, your account may have been blocked due to suspicious activity. Please refer to this link: Unblock my Outlook.com account.
Also, try to fill out the Request for Account Reinstatement and Microsoft Recovery form to recover your account.
If you require further assistance, please don't hesitate to let me know.
Stay Safe!