I'm sorry to hear that you area experiencing display issues with the TWebSchAdmin > Student Maintenance window. As per the 5.4x.xx tab in the Compatibility Matrix and Supported Platform document, we no longer support the IE browser, so have not been testing our products on this platform since January 2020. Is it possible for your users to use a different browser?
One suggestion that we've done at our board is configure internet explorer enterprise mode, and have it push any trillium url over to edge. That way if people use IE out of habit or because they don't know that it's unsupported it automatically redirect them to use a supported browser instead.
