Office 365 Portal: https://portal.office.com
You can reset your Microsoft 365 password by clicking the "Forgot My Password" link on the Office 365 login page (see image below) or the Office 365 Self Password reset portal page (URL is below). Look for the Thompson Hospitality logo.
Office 365 Password Reset portal: https://passwordreset.microsoftonline.com/passwordreset#!/
Once you enter your email address on the password reset portal page, it will look like the image below.