Looking for logging into the Xenapp App Start Windows 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 Xenapp App Start Windows site. After that you can login as usual with your login credentials.
https://discussions.citrix.com/topic/383093-windows-login-screen-opens-when-launching-apps/
https://support.citrix.com/article/CTX220154
https://www.citrix.com/blogs/2012/12/06/windows-login-prompt-when-launching-apps/
https://community.spiceworks.com/topic/460061-xenapp-citrix-randomly-popping-up-windows-login-when-opening-published-app
https://tech.xenit.se/windows-login-prompt-single-sign-xenapp/
https://www.reddit.com/r/Citrix/comments/7jjs61/xenapp_76_windows_login_prompt/
https://www.microsoft.com/de-de/p/citrix-workspace/9wzdncrfj2kj
http://kb.mit.edu/confluence/display/istcontrib/Citrix+Receiver+for+Windows+Installation+and+First+Launch
https://www.citrix.de/products/citrix-virtual-apps-and-desktops/
https://www.citrix.de/downloads/citrix-receiver/
https://helgeklein.com/blog/2015/04/citrix-xenapp-7-6-logon-slow-long-black-screen-phase/
https://securelink.be/blog/windows-10-vdi-optimization-a-compilation-of-the-best-practices/
https://www.jgspiers.com/citrix-director-reduce-logon-times/