ADFS 登录页面自定义

https://blogs.technet.microsoft.com/pie/2015/08/29/customizing-the-ad-fs-sign-in-pages-per-relying-party-trust/

http://eimagine.com/adfs-3-0-logon-page-customization/

https://technet.microsoft.com/en-us/library/dn280950.aspx