Looking for logging into the Rdweb Without Domain site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Rdweb Without Domain site. After that you can login as usual with your login credentials.
https://anandthearchitect.com/2013/11/10/rds-2012-how-to-login-to-rdweb-page-without-typing-domain-name/
https://msfreaks.wordpress.com/2014/07/22/properly-removing-the-domain-prefix-requirement-from-rd-web-access-2012-r2/
https://social.technet.microsoft.com/Forums/ie/en-US/ba3e1188-24ec-4a82-b497-4f5899fbea41/remoteapp-login-without-domain-or-upn?forum=winserverTS
https://community.spiceworks.com/topic/2098133-windows-server-2016-rdp-services-without-domain-and-active-directory
https://nedimmehic.org/2017/02/16/remote-desktop-services-2016-standard-deployment-part-4-rd-web-access-part2/
https://www.reddit.com/r/sysadmin/comments/3e32d4/rdsrdweb_server_2012_r2_how_to_set_default_domain/
http://www.it.ltsoy.com/windows/customise-rdweb/
http://www.edugeek.net/forums/windows-server-2016/179315-avoiding-second-logon-prompt-remoteapp.html
https://www.experts-exchange.com/questions/28695586/2012-R2-RDWeb-Removing-Domain-Prefix.html
https://kb.swivelsecure.com/w/index.php/Microsoft_RD_Web_Access
https://help.authanvil.com/hc/en-us/articles/226791487-Single-Sign-On-for-RD-Web-Access
https://ryanmangansitblog.com/2014/01/13/configure-rds-2012-rdweb-for-access-via-email-upn/
http://www.vkernel.ro/blog/restrict-users-from-login-to-remote-desktop-web-access